Surf Forecasts:
How big are the waves at Mahai'ula Bay today (15 Aug):
- Morning surf: Morning surf (15 Aug, local time) - 1ft (0.3m), 11s period with WNW swell.
- Afternoon surf: Afternoon surf (15 Aug, local time) - 1ft (0.3m), 11s period with WNW swell.
- Evening surf: Evening surf (15 Aug, local time) - 1ft (0.3m), 13s period with WNW swell.
The current surf forecast for Mahai'ula Bay at 4AM is: 0.3m 11s primary swell from a West-northwest direction (forecast issued at 07:00pm August 14). An open ocean swell of 0.9m 13s is not directed at the surf break, a second open ocean swell of 2.1m 7s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Aug) | 1ft (0.3m) | 11s |
| Afternoon (15 Aug) | 1ft (0.3m) | 11s |
| Evening (15 Aug) | 1ft (0.3m) | 13s |
Table - waves today at Mahai'ula Bay. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 39mm), heaviest during Sat night. Warm (max 29°C on Sat morning, min 26°C on Fri night). Winds decreasing (gales from the SSE on Sat night, calm by Sun night). | |||||||||||||||||||
Fri 14 | Saturday 15 | Sunday 16 | |||||||||||||||||
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) | WNW 12 | WNW 12 | WNW 12 | W 12 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | W 11 | WNW 13 | WNW 13 | WNW 13 | WNW 13 | WNW 13 | S 7 | S 13 | S 13 | S 13 | WNW 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 27 | 27 | 27 | 24 | 25 | 24 | 24 | 24 | 22 | 34 | 34 | 58 | 58 | 57 | 0 | 0 | 0 | 0 | 48 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross | cross-off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | glassy | cross-on | cross-on | cross-on | glassy |
High Tide | 5:44AM0.58m | 5:36PM0.67m | 6:30AM0.60m | 6:02PM0.58m | |||||||||||||||
Low Tide | 11:41PM0.07m | 11:27AM0.17m | 00:06AM0.08m | 12:18PM0.24m | |||||||||||||||
 |  | |  | |  |  | |  | | | | |  | | | |  | | |
 | — | — | — | — | 6:03 | — | — | — | — | — | — | — | 6:03 | — | — | — | — | — | — |
 | 6:52 | — | — | — | — | — | — | — | 6:52 | — | — | — | — | — | — | — | 6:52 | — | — |
mm | — | — | — | 4 | 1 | 1 | — | — | 5 | 16 | 4 | 1 | 1 | 1 | 1 | 1 | — | — | — |
Temp °C | 28 | 28 | 27 | 26 | 27 | 27 | 29 | 26 | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 28 | 28 | 27 | 27 |
Feels °C | 32 | 31 | 31 | 29 | 31 | 31 | 31 | 28 | 21 | 20 | 23 | 29 | 30 | 32 | 33 | 32 | 31 | 30 | 32 |
Swell 1 Height (m) Direction Period (s) | NNE 7 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | NNE 8 | S 13 | NE 9 | NE 9 | NNE 8 | NE 8 | S 16 | S 7 | S 6 | S 6 | S 6 | S 15 |
| kJ | 175 | 394 | 366 | 289 | 289 | 284 | 350 | 441 | 284 | 1132 | 178 | 120 | 69 | 422 | 220 | 148 | 89 | 64 | 440 |
Swell 2 Height (m) Direction Period (s) | S 14 | WNW 12 | WNW 12 | W 12 | WNW 11 | WNW 11 | WNW 11 | S 13 | S 18 | WNW 13 | WNW 13 | S 18 | S 17 | NE 8 | S 13 | S 13 | S 13 | S 13 | S 6 |
| kJ | 405 | 27 | 27 | 24 | 25 | 24 | 24 | 280 | 57 | 34 | 34 | 98 | 145 | 51 | 219 | 219 | 222 | 222 | 40 |
Swell 3 Height (m) Direction Period (s) | WNW 12 | SSW 17 | SW 17 | SW 17 | SW 17 | S 20 | W 14 | WNW 11 | W 11 | SSW 16 | NE 13 | WNW 13 | WNW 13 | WNW 13 | NE 8 | NE 8 | NE 8 | S 16 | WNW 12 |
| kJ | 27 | 30 | 12 | 12 | 12 | 30 | 16 | 24 | 22 | 25 | 25 | 58 | 58 | 57 | 51 | 51 | 49 | 125 | 48 |
Wind waves Height (m) Direction Period (s) | — | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 8 | — | NNE 8 | SSE 5 | SSE 9 | S 8 | S 8 | S 7 | S 6 | S 6 | S 6 | NE 8 | NNE 8 |
| kJ | — | 192 | 297 | 453 | 406 | 362 | 519 | — | 1390 | 269 | 2643 | 1457 | 869 | 373 | 225 | 167 | 98 | 46 | 50 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1 | 1 | 11 | 1 | 1 | 1 | 1 | 1 | 19 | 444 | 444 | 32 | 1 | 1 | 58 | 18 | 19 | 19 | 1 |
Best forecast wave conditions in Big Island | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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