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Surf Forecasts:
Power Plant surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 1 am Wednesday 20 May 2026 HSTForecast update in hr min s Forecast update imminent
Power Plant surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Power Plant sea temperature is
25.8° C
(Which is slightly warmer than usual)How big are the waves at Power Plant today?
The current surf forecast for Power Plant at 8AM is: 0.8m 14s primary swell from a South-southwest direction and 0.5m 10s secondary swell from a Northwest direction (forecast issued at 01:00am May 20). An open ocean swell of 1.3m 8s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 2.5ft (0.8m) | 14s |
| Afternoon (20 May) | 2ft (0.6m) | 14s |
| Evening (20 May) | 1.5ft (0.5m) | 14s |
Table - waves today at Power Plant. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 26°C on Wed afternoon, min 23°C on Wed night). Mainly fresh winds. | ||||||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | ||||||||||||||||||||||
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 | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 17 | SSW 17 | S 16 | S 16 | S 16 | S 16 | S 16 | SSW 15 | S 15 | S 15 | S 15 | S 15 | S 14 | S 18 | S 18 | S 18 | S 17 | |
252 | 236 | 236 | 163 | 158 | 149 | 105 | 101 | 102 | 135 | 134 | 134 | 131 | 126 | 172 | 157 | 157 | 157 | 109 | 107 | 98 | 97 | 97 | 138 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | |
High Tide | 6:18AM0.19m | 7:28PM0.72m | 8:01AM0.20m | 8:22PM0.66m | 10:01AM0.25m | 9:15PM0.60m | ||||||||||||||||||
Low Tide | 2:45AM0.14m | 11:14AM0.07m | 3:42AM0.13m | 12:10PM0.14m | 4:27AM0.12m | 1:30PM0.22m | ||||||||||||||||||
 | |  | | | | | |  | | | | | | | | | | |  | | | | | |
 | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:05 | — | — | — | — | — | — | — | 7:06 | — | — | — | — | — | — | — | 7:06 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 24 | 24 | 24 | 25 | 26 | 25 | 23 | 23 | 23 | 23 | 23 | 24 | 25 | 24 | 23 | 23 | 23 | 23 | 23 | 24 | 25 | 24 | 23 | 23 |
23 | 23 | 22 | 23 | 23 | 22 | 20 | 20 | 20 | 20 | 19 | 20 | 20 | 20 | 19 | 19 | 20 | 19 | 19 | 20 | 21 | 19 | 19 | 20 | |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | NNW 10 | SSW 13 | SSW 13 | S 16 | S 16 | S 16 | S 16 | SSW 15 | S 15 | S 15 | S 15 | S 15 | S 14 | S 14 | S 14 | S 14 | S 17 |
 kJ | 252 | 236 | 236 | 163 | 158 | 149 | 105 | 63 | 102 | 102 | 134 | 134 | 131 | 126 | 172 | 157 | 157 | 157 | 109 | 107 | 98 | 93 | 93 | 138 |
Swell 2 Height (m) Direction Period (s) | NNW 11 | NNW 10 | NW 10 | NNW 10 | NNW 10 | NNW 11 | NNW 11 | SSW 13 | NNW 10 | S 16 | SSW 13 | SSW 13 | NNW 10 | SE 13 | SE 13 | SE 13 | SE 13 | SE 12 | SSE 12 | NW 10 | S 18 | S 18 | NNW 11 | NNW 11 |
| kJ | 75 | 94 | 49 | 69 | 95 | 64 | 64 | 101 | 39 | 135 | 69 | 60 | 19 | 44 | 43 | 42 | 40 | 39 | 57 | 27 | 98 | 97 | 46 | 46 |
Swell 3 Height (m) Direction Period (s) | SSE 9 | SE 9 | SSE 9 | SE 9 | SE 9 | SE 7 | SE 9 | SSW 17 | SSW 17 | NNW 10 | NNW 10 | NW 10 | SSW 12 | NNW 10 | NNW 10 | NNW 9 | NNW 10 | NW 10 | NW 10 | SE 12 | NNW 11 | NNW 11 | S 18 | SSW 13 |
| kJ | 34 | 22 | 32 | 21 | 21 | 12 | 21 | 99 | 92 | 38 | 38 | 24 | 30 | 19 | 18 | 17 | 19 | 25 | 25 | 37 | 45 | 46 | 97 | 60 |
Wind waves Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | E 9 | E 9 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 7 | ENE 8 |
| kJ | 206 | 223 | 228 | 257 | 334 | 341 | 403 | 454 | 612 | 597 | 546 | 703 | 829 | 836 | 736 | 715 | 678 | 607 | 547 | 616 | 574 | 575 | 419 | 541 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 3 | 0 | 8 | 12 | 16 | 17 | 19 | 158 | 158 | 158 | 158 | 161 | 158 | 160 | 286 | 160 | 16 | 15 | 15 | 170 | 160 | 172 | 170 | 19 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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