Surf Forecasts:
How big are the waves at Mahai'ula Bay today (19 Aug):
- Morning surf: Morning surf (19 Aug, local time) - 1.5ft (0.4m), 12s period with WNW swell.
The current surf forecast for Mahai'ula Bay at 5AM is: 0.4m 12s primary swell from a West-northwest direction (forecast issued at 01:00am August 19). An open ocean swell of 0.5m 12s is not directed at the surf break, a second open ocean swell of 0.4m 5s is not directed at the surf break. The wind direction is predicted to be glassy.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 Aug) | 1.5ft (0.4m) | 12s |
| Afternoon (19 Aug) | - | - |
| Evening (19 Aug) | - | - |
Table - waves today at Mahai'ula Bay. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 28°C on Wed morning, min 25°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||||||||||
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 | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | WNW 13 | WNW 12 | WNW 12 | WNW 12 | SW 16 | WNW 12 | SW 16 | SW 16 | SW 16 | SW 17 | WNW 11 | WNW 11 | SSW 18 | W 11 | W 11 | W 11 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 11 | W 11 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 54 | 49 | 48 | 48 | 0 | 47 | 0 | 0 | 0 | 0 | 40 | 40 | 0 | 61 | 61 | 59 | 54 | 53 | 55 | 53 | 52 | 75 | 83 | 83 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | on | glassy | glassy | glassy | glassy | cross | glassy | glassy | on | on | on | glassy | cross | cross | glassy | cross-on | on | cross-on | cross | cross | glassy |
High Tide | 9:26AM0.61m | 10:49AM0.62m | 12:03PM0.64m | |||||||||||||||||||||
Low Tide | 1:28AM0.14m | 2:09AM0.16m | 3:15AM0.18m | 8:38PM0.25m | ||||||||||||||||||||
 | |  |  | | | | | | | | | | |  | | | | | | | | | | |
 | — | 6:05 | — | — | — | — | — | — | — | 6:05 | — | — | — | — | — | — | — | 6:05 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:49 | — | — | — | — | — | — | — | 6:49 | — | — | — | — | — | — | — | 6:47 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 28 | 28 | 28 | 27 | 27 | 26 | 26 | 26 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 28 | 28 | 27 | 26 | 26 |
Feels °C | 31 | 30 | 30 | 31 | 32 | 32 | 32 | 32 | 30 | 31 | 30 | 30 | 30 | 30 | 31 | 30 | 30 | 31 | 30 | 31 | 30 | 29 | 29 | 31 |
Swell 1 Height (m) Direction Period (s) | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | NNE 5 | NNE 5 | NNE 4 | NNE 6 | SW 18 | SSW 18 | SSW 18 | SW 17 | SW 16 | SSW 16 | SW 17 | SW 17 | SW 17 | SW 16 | W 10 | NNE 7 | NNE 7 | NNE 7 |
| kJ | 69 | 68 | 69 | 71 | 71 | 72 | 14 | 12 | 12 | 22 | 152 | 209 | 207 | 143 | 133 | 177 | 288 | 298 | 224 | 127 | 52 | 30 | 40 | 56 |
Swell 2 Height (m) Direction Period (s) | NNE 5 | NNE 5 | NNE 4 | NNE 4 | SW 16 | NNE 5 | S 12 | S 12 | SW 16 | SW 17 | NNE 6 | NNE 6 | NNE 7 | W 11 | NNE 7 | NNE 7 | W 10 | W 10 | W 10 | W 10 | SW 16 | W 10 | SW 16 | SW 16 |
| kJ | 9 | 8 | 8 | 8 | 130 | 14 | 71 | 71 | 130 | 147 | 16 | 17 | 18 | 61 | 18 | 26 | 54 | 53 | 55 | 53 | 124 | 75 | 261 | 261 |
Swell 3 Height (m) Direction Period (s) | WNW 13 | WNW 12 | WNW 12 | WNW 12 | NNE 4 | WNW 12 | SW 16 | SW 16 | S 12 | S 12 | WNW 11 | WNW 11 | S 11 | NNE 7 | W 11 | W 11 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | SW 16 | W 11 | W 11 |
| kJ | 54 | 49 | 48 | 48 | 8 | 47 | 66 | 129 | 44 | 42 | 40 | 40 | 37 | 18 | 61 | 59 | 18 | 18 | 18 | 19 | 31 | 121 | 83 | 83 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSE 8 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 12 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 97 | 18 | 18 | 99 | 1 | 18 | 11 | 1 | 26 | 1 | 1 | 36 | 36 | 11 | 1 | 4 | 20 | 1 | 19 | 34 | 34 | 18 | 23 | 0 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
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