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Surf Forecasts:
Coast Guard surfForecast / HAW – Big Island / USA
48hr Weather and Surf, issued 7 am Sunday 17 May 2026 HSTForecast update in hr min s Forecast update imminent
Coast Guard surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Coast Guard sea temperature is
25.7° C
(Which is slightly warmer than usual)How big are the waves at Coast Guard today?
The current surf forecast for Coast Guard at 2PM is: 1.6m 8s primary swell from a East-northeast direction (forecast issued at 07:00am May 17). An open ocean swell of 0.4m 14s is not directed at the surf break, a second open ocean swell of 0.3m 16s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 May) | 4.5ft (1.4m) | 8s |
| Afternoon (17 May) | 5ft (1.6m) | 8s |
| Evening (17 May) | 7ft (2.1m) | 8s |
Table - waves today at Coast Guard. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 25°C on Sun morning, min 23°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||||||
Sunday 17 | Monday 18 | Tuesday 19 | Wed 20 | |||||||||||||||||||||
5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 6 | ENE 8 | ENE 6 | ENE 6 | ENE 8 | ENE 8 | ENE 8 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 8 | ENE 8 | |
223 | 270 | 277 | 353 | 446 | 515 | 600 | 498 | 418 | 418 | 468 | 352 | 393 | 272 | 0 | 348 | 314 | 353 | 0 | 0 | 0 | 373 | 446 | 412 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 2:28AM0.43m | 4:16PM1.00m | 3:09AM0.39m | 5:05PM0.98m | 3:53AM0.36m | 5:58PM0.94m | ||||||||||||||||||
Low Tide | 8:37AM-0.04m | 11:26PM0.29m | 9:17AM-0.02m | 00:32AM0.29m | 10:00AM0.02m | 1:45AM0.29m | ||||||||||||||||||
 |  | | | | | | | | | | | | |  | | | | | | | | | | |
 | 5:46 | — | — | — | — | — | — | — | 5:46 | — | — | — | — | — | — | — | 5:45 | — | — | — | — | — | — | 5:45 |
 | — | — | — | — | 6:52 | — | — | — | — | — | — | — | 6:53 | — | — | — | — | — | — | — | 6:53 | — | — | 6:53 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 24 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 24 | 24 | 23 | 23 |
24 | 24 | 24 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 22 | 21 | 21 | 20 | 20 | |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SSW 15 | SSW 14 | SSW 14 | SW 14 | SW 13 | SSW 19 | SSW 19 | SW 13 | SW 14 | SW 14 | SW 13 | SSW 14 | SSW 18 | SSW 14 | SSW 14 | SSW 14 | SSW 15 | SSW 14 | SSW 14 |
 kJ | 53 | 52 | 102 | 53 | 52 | 76 | 81 | 81 | 47 | 44 | 148 | 148 | 45 | 51 | 51 | 44 | 70 | 121 | 68 | 67 | 69 | 125 | 81 | 81 |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SW 21 | SW 21 | SSW 21 | S 21 | SSW 17 | SSW 14 | SW 13 | SSW 15 | SSW 14 | SSW 16 | SSW 16 | SSW 16 | SW 14 | SSW 14 | SW 18 | SSW 18 | SSW 17 | SSW 13 | NNW 13 | SSW 16 |
| kJ | 52 | 47 | 50 | 49 | 117 | 117 | 45 | 36 | 30 | 41 | 44 | 79 | 40 | 26 | 26 | 53 | 50 | 67 | 80 | 60 | 59 | 17 | 17 | 25 |
Swell 3 Height (m) Direction Period (s) | WSW 4 | NNW 11 | NNW 11 | SSW 21 | SSW 16 | SW 14 | SSW 17 | N 10 | SSW 14 | SSW 18 | SSW 15 | SW 13 | SW 19 | SSW 13 | SSW 13 | SSW 14 | SW 18 | SW 14 | SSW 18 | SSW 14 | SSW 14 | NW 12 | SW 13 | N 13 |
| kJ | 1 | 11 | 11 | 45 | 50 | 33 | 28 | 2 | 20 | 30 | 44 | 44 | 59 | 18 | 18 | 40 | 49 | 31 | 60 | 20 | 18 | 6 | 7 | 3 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 6 | ENE 8 | ENE 6 | ENE 6 | ENE 8 | ENE 8 | ENE 8 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 8 | ENE 8 |
| kJ | 223 | 270 | 277 | 353 | 446 | 515 | 600 | 498 | 418 | 418 | 468 | 352 | 393 | 272 | 222 | 348 | 314 | 353 | 223 | 222 | 246 | 373 | 446 | 412 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 54 | 68 | 73 | 79 | 23 | 23 | 67 | 65 | 65 | 65 | 70 | 23 | 70 | 70 | 65 | 65 | 65 | 65 | 70 | 79 | 73 | 70 | 70 | 65 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
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