Surf Forecasts:
How big are the waves at Mahai'ula Bay today (31 Aug):
- Afternoon surf: Afternoon surf (31 Aug, local time) - 1.5ft (0.4m), 7s period with SW swell.
The current surf forecast for Mahai'ula Bay at 4PM is: 0.4m 7s primary swell from a Southwest direction (forecast issued at 01:00pm August 31). An open ocean swell of 0.9m 8s is not directed at the surf break, a second open ocean swell of 0.5m 10s is not directed at the surf break. The wind direction is predicted to be glassy.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 Aug) | - | - |
| Afternoon (31 Aug) | 1.5ft (0.4m) | 7s |
| Evening (31 Aug) | - | - |
Table - waves today at Mahai'ula Bay. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 28°C on Tue morning, min 25°C on Mon night). Wind will be generally light. | |||||||||||||||||||||
Mon 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||||||
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 |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SW 15 | SW 7 | S 19 | S 19 | S 19 | S 19 | SSW 18 | SSW 18 | SSW 18 | S 18 | S 18 | WSW 7 | SSW 17 | W 11 | S 16 | W 11 | S 16 | S 16 | S 15 | S 15 | S 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 0 | 19 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 0 | 10 | 0 | 9 | 0 | 0 | 0 | 0 | 0 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | cross-off | glassy | glassy | cross-off | cross | cross-on | glassy | cross | glassy | glassy | glassy | glassy | glassy | on | cross-on | glassy | glassy | cross |
High Tide | 5:30PM0.55m | 6:44AM0.67m | 5:58PM0.47m | 7:43AM0.68m | 6:27PM0.39m | ||||||||||||||||
Low Tide | 11:58AM0.22m | 11:50PM0.07m | 1:00PM0.27m | 00:21AM0.07m | 2:28PM0.32m | ||||||||||||||||
 | | |  | |  | |  | | | | | | | | | | | | | | |
 | — | — | — | — | — | — | 6:07 | — | — | — | — | — | — | — | 6:07 | — | — | — | — | — | — |
 | — | — | 6:39 | — | — | — | — | — | — | — | 6:38 | — | — | — | — | — | — | — | 6:37 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 26 | 26 | 26 | 26 | 25 | 26 | 28 | 28 | 28 | 27 | 26 | 26 | 26 | 26 | 28 | 27 | 28 | 27 | 26 |
Feels °C | 30 | 30 | 30 | 28 | 30 | 30 | 27 | 28 | 30 | 32 | 31 | 31 | 30 | 30 | 31 | 30 | 31 | 30 | 31 | 31 | 28 |
Swell 1 Height (m) Direction Period (s) | NNE 7 | NNE 7 | NNE 8 | NNE 8 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | SSW 18 | NNE 7 | NNE 7 | NNE 7 | SSW 17 | S 16 | S 16 | S 16 | S 16 | S 16 | NNE 7 | NNE 7 | NNE 7 |
| kJ | 84 | 86 | 88 | 88 | 114 | 111 | 86 | 86 | 528 | 86 | 81 | 81 | 465 | 659 | 542 | 643 | 507 | 494 | 110 | 93 | 77 |
Swell 2 Height (m) Direction Period (s) | S 11 | S 11 | S 10 | S 19 | S 19 | S 19 | SSW 18 | SSW 18 | NNE 7 | S 18 | S 18 | S 18 | NNE 7 | NNE 8 | NNE 7 | NE 7 | NNE 7 | SSE 11 | S 15 | S 15 | S 15 |
| kJ | 79 | 55 | 54 | 273 | 192 | 267 | 348 | 329 | 86 | 408 | 404 | 390 | 84 | 72 | 70 | 79 | 96 | 23 | 371 | 357 | 347 |
Swell 3 Height (m) Direction Period (s) | SW 15 | S 18 | S 19 | S 10 | S 10 | S 10 | S 10 | S 14 | SW 14 | S 13 | S 12 | S 12 | S 10 | W 11 | S 10 | W 11 | S 11 | SSW 13 | S 11 | S 11 | S 11 |
| kJ | 109 | 169 | 188 | 51 | 49 | 47 | 29 | 97 | 53 | 80 | 74 | 77 | 19 | 10 | 17 | 9 | 39 | 17 | 36 | 36 | 37 |
Wind waves Height (m) Direction Period (s) | — | SW 7 | — | — | — | — | — | — | — | — | — | WSW 7 | — | — | — | — | — | NNE 7 | S 7 | — | — |
| kJ | — | 19 | — | — | — | — | — | — | — | — | — | 5 | — | — | — | — | — | 96 | 4 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 100 | 103 | 1 | 1 | 1 | 1 | 1 | 11 | 99 | 1 | 100 | 1 | 1 | 1 | 1 | 1 | 100 | 113 | 1 | 1 | 11 |
Best forecast wave conditions in Big Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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