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Swell Calculator
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Surf Size, Swell Size, Swell Period & Direction, Wind Speed & Direction

 

Long_Island
Coordinates: 23.4N -75W
Start Time (GMT): 06Z17APR2021
Local Time Zone: GMT -5
© Stormsurf 2021

Surf Hgt
ft
5
4
3
2
1

2.8

2.7

2.5

2.5

2.6

2.5

2.4

2.2

2.0

1.8

1.7

1.6

1.5

1.5

1.4

1.4

1.3

1.3

1.2

1.2

1.2

1.2

1.2

1.1

1.1

1.0

1.0

1.4

1.2

1.3

1.2

1.1

1.0

1.0

0.9

0.9

0.8

1.0

1.1

1.1

1.0

0.6

0.8

1.5

0.5

1.4

1.3

1.2

1.2

1.2

1.2

1.1

0.7

0.6

1.4

1.4

1.4

1.4

1.1

1.2

1.1

Wind
kts
30
25
20
15
10
5

9

11

11

8

6

3

6

10

12

11

12

9

8

5

7

13

12

12

12

9

9

8

9

12

10

10

10

10

12

11

10

13

13

12

12

11

10

5

5

9

10

10

9

7

9

5

9

11

12

13

14

14

14

16

17

17

18

18

18

17

15

WDir
dg
WDir
dg

SE

SSE

S

S

S

SSE

E

E

ESE

SE

SSE

S

SSE

SE

E

E

ESE

SE

SE

SSE

SSE

SE

E

ESE

ESE

SE

SE

SE

SE

SE

ESE

SE

SSE

SE

SE

SSE

SSE

SSE

ESE

E

SE

SE

SE

ESE

ESE

ENE

ENE

ENE

ENE

ENE

ENE

ENE

ENE

ENE

ENE

ENE

E

E

E

ESE

ESE

   

17 Sa 01

17 Sa 04

17 Sa 07

17 Sa 10

17 Sa 13

17 Sa 16

17 Sa 19

17 Sa 22

18 Su 01

18 Su 04

18 Su 07

18 Su 10

18 Su 13

18 Su 16

18 Su 19

18 Su 22

19 Mo 01

19 Mo 04

19 Mo 07

19 Mo 10

19 Mo 13

19 Mo 16

19 Mo 19

19 Mo 22

20 Tu 01

20 Tu 04

20 Tu 07

20 Tu 10

20 Tu 13

20 Tu 16

20 Tu 19

20 Tu 22

21 We 01

21 We 04

21 We 07

21 We 10

21 We 13

21 We 16

21 We 19

21 We 22

22 Th 01

22 Th 04

22 Th 07

22 Th 10

22 Th 13

22 Th 16

22 Th 19

22 Th 22

23 Fr 01

23 Fr 04

23 Fr 07

23 Fr 10

23 Fr 13

23 Fr 16

23 Fr 19

23 Fr 22

24 Sa 01

24 Sa 04

24 Sa 07

24 Sa 10

24 Sa 13

Date/Day/Time (Local - 24 hr)
Swell Hgt
ft

6

5

4

3

2

1

2.5

2.4

2.3

2.3

2.2

2.2

2.1

2.0

1.8

1.7

1.6

1.5

1.5

1.4

1.4

1.4

1.3

1.3

1.2

1.2

1.1

1.1

1.1

1.0

1.1

1.0

1.0

1.2

1.0

1.1

1.1

1.0

1.0

1.0

0.9

0.9

0.8

1.6

1.6

1.6

1.6

0.7

0.9

1.6

0.6

1.5

1.4

1.4

1.3

1.3

1.3

1.3

1.5

0.8

2.0

2.1

2.0

2.0

1.7

1.9

1.7

Swell Per
sec

25

20

15

10

5

11.1

11.0

10.9

10.9

11.7

11.7

11.6

11.2

11.1

10.9

10.8

10.6

10.4

10.4

10.3

10.1

9.9

9.9

10.0

10.5

10.5

10.4

10.3

10.2

10.2

10.2

10.3

11.6

11.3

11.0

10.9

10.7

10.3

10.2

10.2

10.1

9.8

6.0

6.8

6.7

6.6

9.2

8.7

9.1

9.0

9.0

9.0

8.9

8.9

8.9

8.8

8.7

4.8

7.9

7.0

6.8

6.7

6.7

6.5

6.6

6.6

SDir
dg
SDir
dg

30

30

30

30

29

29

28

28

29

28

27

25

23

23

24

24

24

24

24

24

25

26

27

27

28

27

26

27

32

27

28

28

28

27

27

27

27

105

102

101

100

29

99

102

31

100

99

98

99

98

97

96

3

349

1

3

6

10

17

11

12

   

17 Sa 01

17 Sa 04

17 Sa 07

17 Sa 10

17 Sa 13

17 Sa 16

17 Sa 19

17 Sa 22

18 Su 01

18 Su 04

18 Su 07

18 Su 10

18 Su 13

18 Su 16

18 Su 19

18 Su 22

19 Mo 01

19 Mo 04

19 Mo 07

19 Mo 10

19 Mo 13

19 Mo 16

19 Mo 19

19 Mo 22

20 Tu 01

20 Tu 04

20 Tu 07

20 Tu 10

20 Tu 13

20 Tu 16

20 Tu 19

20 Tu 22

21 We 01

21 We 04

21 We 07

21 We 10

21 We 13

21 We 16

21 We 19

21 We 22

22 Th 01

22 Th 04

22 Th 07

22 Th 10

22 Th 13

22 Th 16

22 Th 19

22 Th 22

23 Fr 01

23 Fr 04

23 Fr 07

23 Fr 10

23 Fr 13

23 Fr 16

23 Fr 19

23 Fr 22

24 Sa 01

24 Sa 04

24 Sa 07

24 Sa 10

24 Sa 13

Date/Day/Time (Local - 24 hr)

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