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Marine Science Magnet High School

Q: Is Marine Science Magnet High School a good school?

Marine Science Magnet High School ranks 23 rd of 141 Connecticut high schools. SchoolDigger rates this school 4 stars out of 5.

Public, Magnet Grades 9-12

23^rd

SchoolDigger Rank ?

of 141 Connecticut High Schools

Better than 84% of Connecticut high schools

Summary

Marine Science Magnet High School is a high-performing public magnet school in Groton, Connecticut that serves 271 students in grades 9-12. The school has consistently ranked among the top high schools in the state, maintaining a 4 or 5-star rating from SchoolDigger over the past several years.

Marine Science Magnet High School outperforms most of the nearby public high schools in the region, including Stonington High School, Montville High School, East Lyme High School, Ledyard High School, and Waterford High School, on key metrics such as academic performance and graduation rates. The school has a relatively diverse student population, with 32.84% of students qualifying for free or reduced-price lunch in the 2023-2024 school year.

While the school's academic performance is strong, it has faced challenges with chronic absenteeism, with rates ranging from 13.9% to 25.2% in recent years. The school spends a relatively high amount per student, with $16,947 spent per student in the 2018-2019 school year, compared to the state average of around $18,000 per student. Overall, Marine Science Magnet High School is a standout in the region, thanks to its focus on marine science education and its ability to attract and retain a talented student body.

274

Students ?

10.5

Student/teacher ratio ?

$20,375

Per pupil spending ?

30.7%

Free/discounted lunch ?

130 Shennecossett Road
Groton, CT 06340

(860) 434-4800

District: Learn

Feeder schools for Marine Science Magnet High School:

Elementary:	Canterbury Elementary School
Middle:	Dr. Helen Baldwin Middle School

Racial breakdown:

White:

60.6%

Hispanic:

19.0%

Two or more races:

12.4%

See top rated Connecticut high schools

Compare Marine Science Magnet High School to nearby high schools!

At a glance

▬ Ranking trend: Holding steady — 86th percentile in 2015 → 84th in 2025

Strengths

✓Test scores above the Connecticut average (66% vs 46% meeting standards)

✓Ranks in the top 16% of Connecticut high schools

✓97% graduate in 4 years — above the Connecticut average (89%)

Worth a look

!Some student groups rank well below the school's overall statewide standing

Students meeting standards (2024-2025) ?

This school66%

District avg57%

Connecticut avg46%

23^rd of 141

Connecticut public high schools ?

Top 16%▼ down 2 pts since 2015

See the entire ranking list of Connecticut High Schools →

★★★★★

SchoolDigger rating ?

1^st of 2High Schools in the Learn

Statewide rank percentile over time (100 = the top-ranked school in the state; click a legend item to add a student group)

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2025	85.4	23 of 141	83.7%	★★★★☆
2024	76.3	35 of 145	75.9%	★★★★☆
2023	87.3	18 of 142	87.3%	★★★★☆
2022	91.6	11 of 139	92.1%	★★★★★
2021	91.2	14 of 200	93.0%	★★★★★
2018	91.5	12 of 121	90.1%	★★★★★
2017	88.5	17 of 140	87.9%	★★★★☆
2015	83.7	28 of 196	85.7%	★★★★☆

Female

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2025	71.0	39 of 104	62.5%	★★★☆☆
2024	59.7	50 of 102	51.0%	★★★☆☆
2021	88.6	19 of 189	89.9%	★★★★★

Male

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2025	86.5	16 of 111	85.6%	★★★★☆
2022	93.0	1 of 102	99.0%	★★★★★
2021	90.7	13 of 182	92.9%	★★★★★

White

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2025	87.5	9 of 116	92.2%	★★★★★
2024	66.7	35 of 116	69.8%	★★★★☆
2023	89.4	9 of 116	92.2%	★★★★★
2022	91.9	10 of 117	91.5%	★★★★★
2021	87.3	16 of 155	89.7%	★★★★★

How student groups rank statewide ? (each group's percentile vs the same group at other schools — higher is better; the +/- beside each compares the group with this school's overall percentile)

White (2025)92nd percentile+9 vs school

Male (2025)86th percentile~ school

Female (2025)62nd percentile-21 vs school

By subject vs Connecticut (2024-2025) ?

English Language Arts78%+20 vs state

Science72%+24 vs state

Math49%+18 vs state

★

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Schools Near Marine Science Magnet High School

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Ranking:

E Elementary M Middle H High A Alternative P Private

School	Students/Teachers	Ranking (2025)	Ranking (2024)	NGSS Science (2025)	SAT English Language Arts (2025)	SAT Math (2025)	SBAC English Language Arts (2025)	SBAC Mathematics (2025)	Per Pupil Expenditures (2025)
Marine Science Magnet High School	Public, Magnet	9-12	130 Shennecossett Road	Groton	06340	Southeastern Connecticut Planning Region	Learn	No	Yes	No	No	(860) 434-4800	274	26	10.5	30.7%	166 (60.6%)	4 (1.5%)	52 (19.0%)	15 (5.5%)	0 (0.0%)	0 (0.0%)	34 (12.4%)	85.4	23^rd of 141 public high schools	83.7%	76.3	35^th of 145 public high schools	75.9%	12		71.6	77.8	49.2					$20,375
New London Visual and Performing Arts Magnet Pathway	Public, Magnet	6-12	36 Waller Street	New London	06320	Southeastern Connecticut Planning Region	New London School District	No	Yes	No	Yes	(860) 449-6800	268	24	11.0	81.3%	47 (17.5%)	47 (17.5%)	115 (42.9%)	3 (1.1%)	3 (1.1%)	0 (0.0%)	52 (19.4%)							(n/a)	43.8				30.2	29.8	9.5	17.4	$24,173
Ella T. Grasso Technical High School	Public	9-12	189 Fort Hill Rd.	Groton	06340	Southeastern Connecticut Planning Region	Connecticut Technical Education and Career System	No	No	No	No	(860) 448-0220	684	59	11.6	51.6%	253 (37.0%)	52 (7.6%)	285 (41.7%)	6 (0.9%)	7 (1.0%)	1 (0.1%)	73 (10.7%)	30.7	86^th of 141 public high schools	39.0%	38.3	82^nd of 145 public high schools	43.4%	4		48.1	43.0	11.5					$30,082
Waterford High School	Public	9-12	20 Rope Ferry Rd.	Waterford	06385	Southeastern Connecticut Planning Region	Waterford School District	No	No	No	Yes	(860) 437-6956	713	64	11.0	30.6%	525 (73.6%)	16 (2.2%)	80 (11.2%)	41 (5.8%)	3 (0.4%)	1 (0.1%)	46 (6.5%)	80.7	29^th of 141 public high schools	79.4%	84.7	21^st of 145 public high schools	85.5%	8		55.6	77.3	57.5					$29,429
New London High School	Public	9-12	20 Chester Street	New London	06320	Southeastern Connecticut Planning Region	New London School District	No	No	No	Yes	(860) 437-6400	605	44	13.6	91.2%	35 (5.8%)	97 (16.0%)	428 (70.7%)	5 (0.8%)	2 (0.3%)	1 (0.2%)	37 (6.1%)	2.4	141^st of 141 public high schools	0.0%				(n/a)		6.4	11.7						$23,639
Science and Technology Magnet Pathway for High School Grades	Public, Magnet	9-12	20 Chester Street	New London	06320	Southeastern Connecticut Planning Region	New London School District	No	Yes	No	Yes	(860) 447-6400	171	13	13.2	78.4%	31 (18.1%)	35 (20.5%)	74 (43.3%)	3 (1.8%)	1 (0.6%)	0 (0.0%)	27 (15.8%)							(n/a)		18.8							$23,639
Robert E. Fitch High School	Public	9-12	101 Groton Long Point Road	Groton	06340	Southeastern Connecticut Planning Region	Groton School District	No	No	No	No	(860) 449-7200	942	84	11.1	60.0%	400 (42.5%)	85 (9.0%)	244 (25.9%)	67 (7.1%)	11 (1.2%)	4 (0.4%)	127 (13.5%)							(n/a)		43.0							$23,650
East Lyme High School	Public	9-12	30 Chesterfield Rd.	East Lyme	06333	Southeastern Connecticut Planning Region	East Lyme School District	No	No	No	No	(860) 739-6946	890	90	9.9	24.3%	645 (72.5%)	17 (1.9%)	90 (10.1%)	88 (9.9%)	4 (0.4%)	1 (0.1%)	43 (4.8%)	86.5	19^th of 141 public high schools	86.5%	80.7	25^th of 145 public high schools	82.8%	6		69.8	82.4	48.9					$25,597
Ledyard High School	Public	9-12	24 Gallup Hill Rd.	Ledyard	06339	Southeastern Connecticut Planning Region	Ledyard School District	No	No	No	No	(860) 464-9600	731	64	11.4	27.9%	516 (70.6%)	21 (2.9%)	89 (12.2%)	19 (2.6%)	10 (1.4%)	2 (0.3%)	72 (9.8%)	76.2	36^th of 141 public high schools	74.5%	58.2	62^nd of 145 public high schools	57.2%	26			78.6	38.2					$20,772
Montville High School	Public	9-12	800 Old Colchester Rd.	Oakdale	06370	Southeastern Connecticut Planning Region	Montville School District	No	No	No	No	(860) 848-9208	491	53	9.2	43.0%	284 (57.8%)	23 (4.7%)	74 (15.1%)	37 (7.5%)	3 (0.6%)	2 (0.4%)	68 (13.8%)							(n/a)		45.7							$24,811

Frequently Asked Questions about Marine Science Magnet High School

Is Marine Science Magnet High School a good school?

Marine Science Magnet High School ranks 23^rd of 141 Connecticut high schools. SchoolDigger rates this school 4 stars out of 5.

What district is Marine Science Magnet High School in?

Learn

What is the racial makeup of Marine Science Magnet High School?

Students at Marine Science Magnet High School are 61% White, 19% Hispanic, 12% Two or more races, 5% Asian, 1% African American, 1% Not Specified.

What schools feed into Marine Science Magnet High School?

Marine Science Magnet High School is fed by the following schools:

Elementary : Canterbury Elementary School
Middle : Dr. Helen Baldwin Middle School

How many students attend Marine Science Magnet High School?

In the 2024-25 school year, 274 students attended Marine Science Magnet High School.

Rate Marine Science Magnet High School!

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Schools in Groton, CT

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Latest Connecticut data All new data »

2024–25 school spending dataApr 2, 2026

2024–25 attendance dataNov 6, 2025

2023–24 school spending dataSep 25, 2025

2023–24 graduation ratesSep 23, 2025

SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the Connecticut Department of Education.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.

School													Students/Teachers											Ranking (2025)				Ranking (2024)				NGSS Science (2025)		SAT English Language Arts (2025)	SAT Math (2025)	SBAC English Language Arts (2025)		SBAC Mathematics (2025)		Per Pupil Expenditures (2025)
Name	Type	Grades	Address	City	Zip	County	District	Is Charter	Is Magnet	Is Virtual	Is Title I	Phone	Enrollment	Full-time Teachers	Student/ Teacher Ratio	Free/Discounted Lunch Recipients	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	SchoolDigger Rating (2025)	Average Standard Score (2024)	Statewide Rank (2024)	State Percentile (2024)	Rank Change from Previous Year	NGSS Science 8th Grade	NGSS Science 11th Grade	SAT English Language Arts 11th Grade	SAT Math 11th Grade	SBAC English Language Arts 6th Grade	SBAC English Language Arts 7th Grade	SBAC Mathematics 6th Grade	SBAC Mathematics 7th Grade	Total
Marine Science Magnet High School	Public, Magnet	9-12	130 Shennecossett Road	Groton	06340	Southeastern Connecticut Planning Region	Learn	No	Yes	No	No	(860) 434-4800	274	26	10.5	30.7%	166 (60.6%)	4 (1.5%)	52 (19.0%)	15 (5.5%)	0 (0.0%)	0 (0.0%)	34 (12.4%)	85.4	23^rd of 141 public high schools	83.7%		76.3	35^th of 145 public high schools	75.9%	12		71.6	77.8	49.2					$20,375
New London Visual and Performing Arts Magnet Pathway	Public, Magnet	6-12	36 Waller Street	New London	06320	Southeastern Connecticut Planning Region	New London School District	No	Yes	No	Yes	(860) 449-6800	268	24	11.0	81.3%	47 (17.5%)	47 (17.5%)	115 (42.9%)	3 (1.1%)	3 (1.1%)	0 (0.0%)	52 (19.4%)								(n/a)	43.8				30.2	29.8	9.5	17.4	$24,173
Ella T. Grasso Technical High School	Public	9-12	189 Fort Hill Rd.	Groton	06340	Southeastern Connecticut Planning Region	Connecticut Technical Education and Career System	No	No	No	No	(860) 448-0220	684	59	11.6	51.6%	253 (37.0%)	52 (7.6%)	285 (41.7%)	6 (0.9%)	7 (1.0%)	1 (0.1%)	73 (10.7%)	30.7	86^th of 141 public high schools	39.0%		38.3	82^nd of 145 public high schools	43.4%	4		48.1	43.0	11.5					$30,082
Waterford High School	Public	9-12	20 Rope Ferry Rd.	Waterford	06385	Southeastern Connecticut Planning Region	Waterford School District	No	No	No	Yes	(860) 437-6956	713	64	11.0	30.6%	525 (73.6%)	16 (2.2%)	80 (11.2%)	41 (5.8%)	3 (0.4%)	1 (0.1%)	46 (6.5%)	80.7	29^th of 141 public high schools	79.4%		84.7	21^st of 145 public high schools	85.5%	8		55.6	77.3	57.5					$29,429
New London High School	Public	9-12	20 Chester Street	New London	06320	Southeastern Connecticut Planning Region	New London School District	No	No	No	Yes	(860) 437-6400	605	44	13.6	91.2%	35 (5.8%)	97 (16.0%)	428 (70.7%)	5 (0.8%)	2 (0.3%)	1 (0.2%)	37 (6.1%)	2.4	141^st of 141 public high schools	0.0%					(n/a)		6.4	11.7						$23,639
Science and Technology Magnet Pathway for High School Grades	Public, Magnet	9-12	20 Chester Street	New London	06320	Southeastern Connecticut Planning Region	New London School District	No	Yes	No	Yes	(860) 447-6400	171	13	13.2	78.4%	31 (18.1%)	35 (20.5%)	74 (43.3%)	3 (1.8%)	1 (0.6%)	0 (0.0%)	27 (15.8%)								(n/a)		18.8							$23,639
Robert E. Fitch High School	Public	9-12	101 Groton Long Point Road	Groton	06340	Southeastern Connecticut Planning Region	Groton School District	No	No	No	No	(860) 449-7200	942	84	11.1	60.0%	400 (42.5%)	85 (9.0%)	244 (25.9%)	67 (7.1%)	11 (1.2%)	4 (0.4%)	127 (13.5%)								(n/a)		43.0							$23,650
East Lyme High School	Public	9-12	30 Chesterfield Rd.	East Lyme	06333	Southeastern Connecticut Planning Region	East Lyme School District	No	No	No	No	(860) 739-6946	890	90	9.9	24.3%	645 (72.5%)	17 (1.9%)	90 (10.1%)	88 (9.9%)	4 (0.4%)	1 (0.1%)	43 (4.8%)	86.5	19^th of 141 public high schools	86.5%		80.7	25^th of 145 public high schools	82.8%	6		69.8	82.4	48.9					$25,597
Ledyard High School	Public	9-12	24 Gallup Hill Rd.	Ledyard	06339	Southeastern Connecticut Planning Region	Ledyard School District	No	No	No	No	(860) 464-9600	731	64	11.4	27.9%	516 (70.6%)	21 (2.9%)	89 (12.2%)	19 (2.6%)	10 (1.4%)	2 (0.3%)	72 (9.8%)	76.2	36^th of 141 public high schools	74.5%		58.2	62^nd of 145 public high schools	57.2%	26			78.6	38.2					$20,772
Montville High School	Public	9-12	800 Old Colchester Rd.	Oakdale	06370	Southeastern Connecticut Planning Region	Montville School District	No	No	No	No	(860) 848-9208	491	53	9.2	43.0%	284 (57.8%)	23 (4.7%)	74 (15.1%)	37 (7.5%)	3 (0.6%)	2 (0.4%)	68 (13.8%)								(n/a)		45.7							$24,811