Surf Forecasts:
How big are the waves at Mahai'ula Bay today (13 Aug):
- Afternoon surf: Afternoon surf (13 Aug, local time) - 1ft (0.3m), 12s period with WNW swell.
- Evening surf: Evening surf (13 Aug, local time) - 1ft (0.3m), 12s period with WNW swell.
The current surf forecast for Mahai'ula Bay at 7PM is: 0.3m 12s primary swell from a West-northwest direction (forecast issued at 01:00pm August 13). An open ocean swell of 1.3m 15s is not directed at the surf break, a second open ocean swell of 1.0m 6s is not directed at the surf break. The wind direction is predicted to be glassy.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Aug) | - | - |
| Afternoon (13 Aug) | 1ft (0.3m) | 12s |
| Evening (13 Aug) | 1ft (0.3m) | 12s |
Table - waves today at Mahai'ula Bay. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 29mm), heaviest during Sat night. Warm (max 29°C on Fri morning, min 25°C on Thu night). Winds increasing (calm on Sat morning, near gales from the S by Sat night). | |||||||||||||||||||||
Thu 13 | Friday 14 | Saturday 15 | |||||||||||||||||||
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) | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 11 | WNW 11 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | W 12 | W 11 | WNW 11 | WNW 11 | WNW 11 | S 13 | S 13 | WNW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 28 | 28 | 27 | 28 | 28 | 28 | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 24 | 22 | 24 | 24 | 24 | 0 | 0 | 57 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | glassy | glassy | glassy | glassy | cross-off | cross-off | cross-on | glassy | glassy | cross | cross-off | glassy | cross-off | cross-off | glassy | glassy | glassy | off | cross-off |
High Tide | 4:34PM0.83m | 5:00AM0.54m | 5:06PM0.76m | 5:44AM0.58m | 5:36PM0.67m | ||||||||||||||||
Low Tide | 9:51AM0.05m | 11:15PM0.07m | 10:38AM0.10m | 11:41PM0.07m | 11:27AM0.17m | ||||||||||||||||
 |  | |  | | | | | | | | | | |  | | | |  |  | | |
 | — | — | — | — | — | — | 6:03 | — | — | — | — | — | — | — | 6:03 | — | — | — | — | — | — |
 | — | — | 6:53 | — | — | — | — | — | — | — | 6:52 | — | — | — | — | — | — | — | 6:52 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 2 |
Temp °C | 28 | 27 | 28 | 27 | 26 | 25 | 26 | 27 | 29 | 29 | 28 | 27 | 28 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 |
Feels °C | 31 | 30 | 32 | 31 | 30 | 28 | 28 | 28 | 31 | 33 | 32 | 30 | 31 | 31 | 29 | 30 | 31 | 31 | 30 | 29 | 25 |
Swell 1 Height (m) Direction Period (s) | S 16 | S 15 | S 15 | S 15 | S 15 | S 15 | S 14 | S 14 | S 14 | S 14 | NNE 6 | NNE 7 | S 14 | S 13 | NNE 7 | S 13 | NNE 7 | NNE 7 | NNE 8 | NNE 8 | S 14 |
| kJ | 697 | 559 | 753 | 753 | 743 | 619 | 610 | 508 | 508 | 508 | 170 | 154 | 366 | 356 | 192 | 284 | 204 | 193 | 183 | 197 | 243 |
Swell 2 Height (m) Direction Period (s) | SSW 12 | SSW 12 | NNE 6 | NNE 6 | WNW 12 | NNE 6 | NNE 6 | NNE 6 | WNW 11 | WNW 12 | S 14 | S 14 | WNW 12 | W 12 | S 13 | WNW 11 | S 13 | S 13 | S 13 | S 13 | S 18 |
| kJ | 147 | 152 | 66 | 77 | 28 | 88 | 70 | 68 | 25 | 26 | 489 | 394 | 27 | 24 | 356 | 24 | 284 | 280 | 284 | 289 | 99 |
Swell 3 Height (m) Direction Period (s) | WNW 12 | WNW 12 | WNW 12 | WNW 12 | SW 18 | WNW 12 | WNW 12 | WNW 11 | SW 18 | SSW 18 | WNW 12 | WNW 12 | SW 17 | SW 17 | W 11 | S 20 | WNW 11 | WNW 11 | S 18 | S 18 | WNW 13 |
| kJ | 28 | 28 | 27 | 28 | 13 | 28 | 26 | 25 | 12 | 30 | 27 | 27 | 12 | 12 | 22 | 30 | 24 | 24 | 57 | 99 | 57 |
Wind waves Height (m) Direction Period (s) | NNE 5 | NNE 6 | — | — | NNE 6 | — | — | — | NNE 6 | NNE 6 | — | — | NNE 7 | NNE 7 | — | NNE 7 | — | — | — | SSE 2 | NNE 8 |
| kJ | 46 | 64 | — | — | 88 | — | — | — | 60 | 131 | — | — | 165 | 192 | — | 186 | — | — | — | 1 | 243 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 11 | 100 | 1 | 1 | 4 | 1 | 1 | 1 | 100 | 1 | 1 | 15 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 444 |
Best forecast wave conditions in Big Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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