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Waimanu Bay Surf Forecast
/ HAW – Big Island (60 breaks) / Hawaii (267 breaks) /
Surf Forecasts:
Waimanu Bay surfForecast / HAW – Big Island / USA
48hr Weather and Surf, issued 1 pm Monday 18 May 2026 HSTForecast update in hr min s Forecast update imminent
Waimanu Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Waimanu Bay sea temperature is
25.8° C
(Which is slightly warmer than usual)How big are the waves at Waimanu Bay today?
The current surf forecast for Waimanu Bay at 6PM is: 1.7m 8s primary swell from a East direction and 0.2m 13s secondary swell from a North-northwest direction, 0.2m 9s secondary swell from a North-northwest direction (forecast issued at 01:00pm May 18). The wind direction is predicted to be cross-onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 6ft (1.8m) | 8s |
| Afternoon (18 May) | 6ft (1.8m) | 8s |
| Evening (18 May) | 5ft (1.6m) | 8s |
Table - waves today at Waimanu Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 4mm), mostly falling on Mon afternoon. Warm (max 26°C on Mon afternoon, min 23°C on Wed night). Mainly fresh winds. | ||||||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
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 | 5 AM | 8 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | |
439 | 428 | 383 | 341 | 343 | 302 | 343 | 334 | 383 | 383 | 428 | 402 | 412 | 412 | 509 | 574 | 602 | 632 | 647 | 662 | 647 | 632 | 660 | 678 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | |
High Tide | 4:57PM1.05m | 3:53AM0.45m | 5:46PM1.01m | 4:45AM0.42m | 6:38PM0.95m | 5:56AM0.39m | ||||||||||||||||||
Low Tide | 9:19AM-0.03m | 00:02AM0.33m | 10:02AM0.01m | 1:05AM0.33m | 10:46AM0.08m | 2:13AM0.32m | ||||||||||||||||||
 |  |  |  | |  | | |  | | |  | | | | | | | | | |  | | | |
 | — | — | — | — | — | — | 5:43 | — | — | — | — | — | — | — | 5:43 | — | — | — | — | — | — | — | 5:43 | — |
 | — | — | 6:52 | — | — | — | — | — | — | — | 6:52 | — | — | — | — | — | — | — | 6:52 | — | — | — | — | 6:53 |
— | 1 | 1 | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 26 | 26 | 25 | 25 | 24 | 24 | 24 | 25 | 26 | 26 | 25 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 24 | 24 | 23 | 23 | 23 | 24 |
26 | 26 | 25 | 25 | 25 | 24 | 24 | 25 | 26 | 27 | 25 | 23 | 24 | 24 | 23 | 23 | 23 | 23 | 22 | 22 | 21 | 21 | 21 | 22 | |
Swell 1 Height (m) Direction Period (s) | NNW 9 | NNW 9 | NNW 13 | NNW 13 | NNW 12 | NNW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NNW 11 | NNW 12 | NNW 11 | NNW 11 | NNW 11 | NNW 11 | NNW 12 | NNW 12 | NNW 12 | NNW 11 | NNW 11 | NNW 11 | NNW 11 | NNW 11 |
 kJ | 17 | 8 | 18 | 17 | 15 | 14 | 37 | 37 | 19 | 31 | 51 | 54 | 51 | 47 | 47 | 48 | 79 | 79 | 77 | 46 | 46 | 45 | 45 | 44 |
Swell 2 Height (m) Direction Period (s) | NNW 15 | NNW 14 | NNW 9 | NNW 9 | NNW 9 | NNW 9 | NW 8 | NW 8 | NNW 13 | N 8 | SE 15 | SE 15 | ESE 9 | N 13 | NNW 13 | SE 14 | SE 14 | SE 14 | SE 14 | SE 14 | — | — | — | — |
| kJ | 21 | 20 | 8 | 8 | 8 | 8 | 3 | 3 | 17 | 1 | 9 | 9 | 199 | 14 | 17 | 8 | 8 | 8 | 8 | 8 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | S 16 | NNW 9 | N 15 | S 16 | S 16 | N 8 | SE 15 | — | — | NW 11 | NNW 13 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 5 | 8 | 4 | 5 | 5 | 1 | 9 | — | — | 61 | 34 | — | — | — | — | — | — | — | — | — | — |
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 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 8 | ENE 8 |
| kJ | 439 | 428 | 383 | 341 | 343 | 302 | 343 | 334 | 383 | 383 | 428 | 402 | 412 | 412 | 509 | 574 | 602 | 632 | 647 | 662 | 647 | 632 | 660 | 678 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 98 | 24 | 58 | 70 | 70 | 66 | 66 | 66 | 98 | 101 | 98 | 66 | 77 | 77 | 69 | 66 | 58 | 107 | 66 | 58 | 58 | 69 | 68 | 58 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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