|
Surf Height Range in Feet as a Function of Swell Height (Hs) and Swell Period
(Ts)
Adjacent to a Coast for a Beach Slope of 0.02 and an Angle of Incidence (A) of
30 Degrees
Hs
(feet)
|
18 |
|
|
|
|
|
|
|
|
20-26 |
20-26 |
21-27 |
21-27 |
22-29 |
23-30 |
24-31 |
25-32 |
25-33 |
| 17 |
|
|
|
|
|
|
|
|
19-25 |
19-25 |
20-26 |
20-26 |
21-28 |
22-29 |
23-30 |
26-31 |
26-32 |
| 16 |
|
|
|
|
|
|
|
|
18-23 |
18-23 |
19-25 |
20-26 |
21-27 |
22-28 |
23-29 |
23-30 |
23-30 |
| 15 |
|
|
|
|
|
|
|
|
17-22 |
17-22 |
18-24 |
19-25 |
20-26 |
21-27 |
21-27 |
22-28 |
22-28 |
| 14 |
|
|
|
|
|
|
15-20 |
15-20 |
16-21 |
16-21 |
17-23 |
17-23 |
18-24 |
19-25 |
20-26 |
21-27 |
21-27 |
| 13 |
|
|
|
|
|
|
14-18 |
14-18 |
15-20 |
15-20 |
16-22 |
17-22 |
17-23 |
18-24 |
19-25 |
20-26 |
20-26 |
| 12 |
|
|
|
|
|
|
13-17 |
13-18 |
14-19 |
15-20 |
16-21 |
17-22 |
17-22 |
18-23 |
18-23 |
19-25 |
19-25 |
| 11 |
|
|
|
|
|
|
12-16 |
12-17 |
13-18 |
13-18 |
15-20 |
16-21 |
16-21 |
17-22 |
17-22 |
18-23 |
18-23 |
| 10 |
|
|
|
|
|
|
11-15 |
11-15 |
12-16 |
13-17 |
14-18 |
14-19 |
14-19 |
15-20 |
16-21 |
16-21 |
16-21 |
| 9 |
|
|
|
|
|
|
10-13 |
10-14 |
11-15 |
12-16 |
12-16 |
13-17 |
13-18 |
14-19 |
14-19 |
15-20 |
15-20 |
| 8 |
|
|
|
|
9-11 |
9-11 |
10-12 |
10-13 |
11-14 |
11-14 |
11-15 |
12-16 |
12-16 |
13-17 |
13-17 |
14-18 |
14-18 |
| 7 |
|
|
|
|
8-10 |
8-10 |
9-11 |
9-12 |
10-13 |
10-13 |
10-14 |
11-15 |
11-15 |
12-16 |
12-16 |
13-17 |
13-17 |
| 6 |
|
|
|
|
7-9 |
8-10 |
8-10 |
9-11 |
9-11 |
9-12 |
9-12 |
10-13 |
10-13 |
11-14 |
11-14 |
11-15 |
11-15 |
| 5 |
|
|
|
|
6-8 |
7-9 |
7-9 |
8-10 |
8-10 |
8-11 |
8-11 |
9-12 |
9-12 |
|
|
|
|
| 4 |
|
|
4-6 |
4-6 |
5-7 |
5-7 |
6-8 |
6-8 |
7-9 |
7-9 |
7-9 |
8-10 |
8-10 |
|
|
|
|
| 3 |
|
|
4-5 |
4-5 |
4-5 |
5-6 |
5-6 |
5-7 |
5-7 |
|
|
|
|
|
|
|
|
| 2 |
2-3 |
2-3 |
2-3 |
3-4 |
3-4 |
3-5 |
3-5 |
|
|
|
|
|
|
|
|
|
|
| 1 |
1-2 |
1-2 |
1-2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
|
Ts (seconds)
|
(1) Applies to beaches with moderate to gentle slope offshore (i.e., 1:50 = 0.02
slope
or less; characteristic of most beaches around the Continental United States).
(2) Assumes a long straight coast with constant beach slope (i.e., neglects
focusing/defocusing effects due to headlands, bays, and irregularities in water
depth).
(3) Angle of incidence (i.e., angle between deep-water swell direction
and line perpendicular to coastline) equal to 30 degrees.
(4) Occasional set waves expected to be about
25% larger than the upper range depicted in the table.
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