Surf Forecasts:
How big are the waves at Mahai'ula Bay today (21 Aug):
- Morning surf: Morning surf (21 Aug, local time) - 1.5ft (0.5m), 10s period with W swell.
- Afternoon surf: Afternoon surf (21 Aug, local time) - 1.5ft (0.5m), 11s period with W swell.
- Evening surf: Evening surf (21 Aug, local time) - 1.5ft (0.5m), 10s period with W swell.
The current surf forecast for Mahai'ula Bay at 7AM is: 0.5m 10s primary swell from a West direction (forecast issued at 01:00am August 21). An open ocean swell of 0.7m 17s is not directed at the surf break. The wind direction is predicted to be glassy.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Aug) | 1.5ft (0.5m) | 10s |
| Afternoon (21 Aug) | 1.5ft (0.5m) | 11s |
| Evening (21 Aug) | 1.5ft (0.5m) | 10s |
Table - waves today at Mahai'ula Bay. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 3mm), mostly falling on Sun afternoon. Warm (max 28°C on Fri morning, min 26°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||||||||||
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) | W 10 | W 10 | W 10 | W 10 | W 11 | W 11 | W 10 | W 10 | SW 16 | SSW 16 | W 10 | W 10 | W 10 | WNW 11 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 12 | WNW 12 | WNW 11 | WNW 11 | WNW 10 | WNW 11 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 53 | 52 | 51 | 52 | 58 | 83 | 54 | 51 | 0 | 0 | 51 | 51 | 56 | 88 | 82 | 82 | 82 | 121 | 158 | 119 | 105 | 78 | 73 | 65 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | cross-on | cross-on | cross | cross-on | glassy | glassy | glassy | cross-off | cross-on | cross-on | glassy | glassy | glassy | cross-off | glassy | glassy | on | glassy | glassy | glassy | glassy |
High Tide | 12:03PM0.64m | 11:29PM0.26m | 12:58PM0.68m | 00:53AM0.29m | 1:40PM0.72m | |||||||||||||||||||
Low Tide | 3:15AM0.18m | 8:38PM0.25m | 4:44AM0.18m | 8:45PM0.21m | 5:58AM0.15m | 9:01PM0.18m | ||||||||||||||||||
 | |  |  | | |  | | | | | | | | | | | | | | |  |  | | |
 | — | 6:05 | — | — | — | — | — | — | — | 6:05 | — | — | — | — | — | — | — | 6:05 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:47 | — | — | — | — | — | — | — | 6:46 | — | — | — | — | — | — | — | 6:45 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 |
Temp °C | 26 | 26 | 27 | 28 | 28 | 28 | 27 | 27 | 26 | 26 | 27 | 28 | 27 | 27 | 27 | 27 | 26 | 26 | 27 | 28 | 27 | 28 | 27 | 27 |
Feels °C | 31 | 30 | 31 | 31 | 31 | 31 | 32 | 32 | 31 | 30 | 31 | 32 | 30 | 31 | 32 | 32 | 30 | 30 | 32 | 32 | 31 | 32 | 31 | 32 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 17 | SW 17 | SW 16 | W 11 | W 11 | SW 16 | NNE 7 | SW 16 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 6 |
| kJ | 284 | 298 | 224 | 127 | 58 | 83 | 261 | 38 | 261 | 37 | 35 | 34 | 51 | 51 | 60 | 53 | 56 | 56 | 55 | 45 | 62 | 60 | 52 | 40 |
Swell 2 Height (m) Direction Period (s) | W 10 | W 10 | W 10 | W 10 | SW 16 | SW 16 | NNE 7 | SW 16 | NNE 7 | S 14 | SSW 16 | SSW 16 | SSW 15 | WNW 11 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 12 | WNW 12 | WNW 11 | WNW 11 | WNW 10 | SSW 15 |
| kJ | 53 | 52 | 51 | 52 | 124 | 121 | 40 | 261 | 38 | 138 | 164 | 164 | 150 | 88 | 82 | 82 | 82 | 121 | 158 | 119 | 105 | 78 | 73 | 188 |
Swell 3 Height (m) Direction Period (s) | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | W 10 | W 10 | S 13 | SSW 16 | W 10 | W 10 | W 10 | SW 15 | SW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | S 15 | WNW 11 |
| kJ | 18 | 18 | 18 | 18 | 18 | 30 | 54 | 51 | 126 | 160 | 51 | 51 | 56 | 112 | 110 | 152 | 150 | 148 | 146 | 144 | 142 | 126 | 110 | 65 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | WSW 2 | SW 10 | SSE 10 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 25 | 42 | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1 | 1 | 1 | 36 | 36 | 34 | 18 | 1 | 11 | 11 | 1 | 36 | 36 | 0 | 0 | 0 | 0 | 0 | 0 | 34 | 0 | 0 | 0 | 1 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
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