Surf Forecasts:
How big are the waves at Mahai'ula Bay today (17 Aug):
- Afternoon surf: Afternoon surf (17 Aug, local time) - 1.5ft (0.4m), 11s period with WNW swell.
- Evening surf: Evening surf (17 Aug, local time) - 1.5ft (0.4m), 11s period with WNW swell.
The current surf forecast for Mahai'ula Bay at 2PM is: 0.4m 11s primary swell from a West-northwest direction (forecast issued at 07:00am August 17). An open ocean swell of 0.9m 14s is not directed at the surf break, a second open ocean swell of 0.8m 6s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Aug) | - | - |
| Afternoon (17 Aug) | 1.5ft (0.4m) | 11s |
| Evening (17 Aug) | 1.5ft (0.4m) | 11s |
Table - waves today at Mahai'ula Bay. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 3mm), mostly falling on Mon night. Warm (max 28°C on Mon morning, min 25°C on Tue night). Wind will be generally light. | |||||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||||||||
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 |  |  |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | WNW 11 | S 14 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | N 6 | S 13 | WNW 13 | WNW 13 | WNW 13 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | SW 16 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 43 | 0 | 42 | 42 | 42 | 42 | 43 | 25 | 24 | 24 | 42 | 9 | 0 | 58 | 57 | 54 | 49 | 48 | 48 | 48 | 47 | 47 | 0 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross | cross-on | glassy | glassy | cross-off | cross-off | cross | glassy | on | on | glassy | glassy | glassy | cross-on | on | on | on | on | glassy | glassy | cross-off |
High Tide | 7:19AM0.61m | 6:25PM0.49m | 8:16AM0.61m | 6:42PM0.41m | 9:26AM0.61m | ||||||||||||||||||
Low Tide | 1:18PM0.30m | 00:58AM0.11m | 2:41PM0.35m | 1:28AM0.14m | |||||||||||||||||||
 |  | |  | |  | |  |  |  | | | | | | | | | | | | | | |
 | 6:03 | — | — | — | — | — | — | — | 6:05 | — | — | — | — | — | — | — | 6:05 | — | — | — | — | — | — |
 | — | — | — | — | 6:51 | — | — | — | — | — | — | — | 6:50 | — | — | — | — | — | — | — | 6:49 | — | — |
mm | — | — | — | — | — | — | — | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 28 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 26 | 26 | 26 | 25 | 26 | 27 | 28 | 28 | 26 | 26 |
Feels °C | 32 | 31 | 32 | 31 | 32 | 33 | 31 | 29 | 30 | 30 | 29 | 30 | 32 | 30 | 30 | 30 | 28 | 30 | 30 | 31 | 32 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 13 | NNE 6 | NNE 5 | S 13 | S 13 | S 13 | S 13 | NNE 5 | NNE 5 | NNE 5 | NNE 5 | S 12 | S 12 | S 12 | S 12 | S 12 | NNE 5 |
| kJ | 503 | 333 | 333 | 320 | 253 | 243 | 225 | 60 | 31 | 160 | 162 | 162 | 121 | 22 | 22 | 24 | 14 | 69 | 71 | 71 | 72 | 72 | 12 |
Swell 2 Height (m) Direction Period (s) | NNE 7 | NE 7 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | WNW 11 | S 13 | S 13 | NNE 5 | NNE 6 | NNE 6 | NNE 5 | S 13 | S 13 | S 12 | S 12 | NNE 5 | WNW 12 | SW 16 | WNW 12 | SW 16 | S 12 |
| kJ | 36 | 47 | 54 | 51 | 34 | 33 | 43 | 167 | 162 | 25 | 28 | 20 | 19 | 121 | 119 | 69 | 68 | 7 | 48 | 130 | 47 | 66 | 71 |
Swell 3 Height (m) Direction Period (s) | WNW 11 | SSW 5 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | S 4 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | SW 18 | SW 18 | WNW 13 | WNW 13 | WNW 13 | WNW 12 | WNW 12 | SW 16 | WNW 12 | SW 16 | WNW 12 | SW 16 |
| kJ | 43 | 8 | 42 | 42 | 42 | 42 | 1 | 25 | 24 | 24 | 42 | 78 | 80 | 58 | 57 | 54 | 49 | 48 | 67 | 48 | 65 | 47 | 129 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | N 6 | N 6 | NNE 5 | — | W 6 | — | — | N 6 | — | — | — | — | — | — | — | NE 4 | NNE 4 | NNE 4 | — |
| kJ | — | — | — | — | 26 | 18 | 46 | — | 7 | — | — | 9 | — | — | — | — | — | — | — | 5 | 7 | 11 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 1 | 24 | 100 | 100 | 0 | 1 | 18 | 1 | 18 | 19 | 100 | 100 | 11 | 1 | 1 | 18 | 97 | 34 | 99 | 34 | 11 | 14 | 1 |
Best forecast wave conditions in Big Island | |||||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||||
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