Surf Forecasts:
How big are the waves at Mahai'ula Bay today (17 Jul):
- Morning surf: Morning surf (17 Jul, local time) - 2.5ft (0.8m), 14s period with W swell.
- Afternoon surf: Afternoon surf (17 Jul, local time) - 2.5ft (0.7m), 14s period with W swell.
- Evening surf: Evening surf (17 Jul, local time) - 2.5ft (0.7m), 14s period with W swell.
The current surf forecast for Mahai'ula Bay at 6AM is: 0.8m 14s primary swell from a West-northwest direction (forecast issued at 01:00am July 17). An open ocean swell of 0.6m 7s is not directed at the surf break, a second open ocean swell of 0.5m 7s is not directed at the surf break. The wind direction is predicted to be glassy and the swell rating is 2.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Jul) | 2.5ft (0.8m) | 14s |
| Afternoon (17 Jul) | 2.5ft (0.7m) | 14s |
| Evening (17 Jul) | 2.5ft (0.7m) | 14s |
Table - waves today at Mahai'ula Bay. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 2mm), mostly falling on Sun night. Warm (max 28°C on Fri morning, min 25°C on Sat night). Wind will be generally light. | ||||||||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | ||||||||||||||||||||||
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 14 | WNW 14 | WNW 14 | W 14 | W 14 | W 14 | W 14 | W 14 | W 14 | W 14 | W 13 | W 13 | W 13 | W 13 | W 13 | W 13 | W 13 | W 13 | WNW 13 | S 13 | S 18 | S 18 | S 18 | S 17 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 280 | 280 | 280 | 264 | 200 | 198 | 195 | 192 | 189 | 134 | 130 | 126 | 89 | 87 | 87 | 87 | 87 | 86 | 55 | 0 | 0 | 0 | 0 | 0 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | glassy | cross | on | glassy | cross-off | cross-off | glassy | cross-on | on | cross-on | cross-on | cross-on | glassy | glassy | glassy | glassy | glassy | cross-on | cross | cross | glassy |
High Tide | 6:13AM0.45m | 6:17PM0.77m | 7:09AM0.48m | 6:50PM0.67m | 8:11AM0.52m | 7:20PM0.57m | ||||||||||||||||||
Low Tide | 00:39AM0.08m | 11:32AM0.14m | 1:11AM0.09m | 12:27PM0.22m | 1:43AM0.10m | 1:31PM0.30m | ||||||||||||||||||
 | |  | | |  | | | |  | | | | | |  | | | | | | | |  | |
 | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:06 | — | — | — | — | — | — | — | 7:05 | — | — | — | — | — | — | — | 7:05 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 26 | 26 | 27 | 28 | 28 | 28 | 27 | 27 | 26 | 26 | 26 | 27 | 27 | 27 | 26 | 26 | 25 | 25 | 26 | 27 | 26 | 26 | 25 | 25 |
Feels °C | 30 | 30 | 31 | 31 | 30 | 31 | 30 | 30 | 29 | 30 | 29 | 29 | 30 | 30 | 30 | 30 | 29 | 29 | 30 | 31 | 29 | 29 | 28 | 29 |
Swell 1 Height (m) Direction Period (s) | WNW 14 | WNW 14 | WNW 14 | W 14 | W 14 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 6 | NNE 6 | NNE 5 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 6 |
| kJ | 280 | 280 | 280 | 264 | 200 | 51 | 57 | 51 | 51 | 51 | 50 | 51 | 54 | 91 | 97 | 79 | 33 | 35 | 35 | 34 | 33 | 32 | 33 | 33 |
Swell 2 Height (m) Direction Period (s) | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | SSW 16 | SSW 16 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | S 12 | S 12 | SSW 12 | SSW 12 | S 13 | S 13 | S 18 | S 18 | S 17 |
| kJ | 40 | 41 | 26 | 31 | 40 | 259 | 344 | 218 | 218 | 213 | 210 | 156 | 213 | 210 | 133 | 73 | 108 | 117 | 85 | 115 | 125 | 162 | 160 | 220 |
Swell 3 Height (m) Direction Period (s) | SSW 17 | SSW 16 | S 16 | S 16 | S 16 | W 14 | W 14 | W 14 | W 14 | W 14 | W 13 | W 13 | W 13 | W 13 | W 13 | W 13 | W 13 | W 13 | WNW 13 | S 19 | S 18 | SSW 13 | S 12 | SSW 12 |
| kJ | 97 | 91 | 132 | 131 | 183 | 198 | 195 | 192 | 189 | 134 | 130 | 126 | 89 | 87 | 87 | 87 | 87 | 86 | 55 | 112 | 159 | 95 | 71 | 44 |
Wind waves Height (m) Direction Period (s) | — | N 7 | — | — | — | — | — | N 7 | — | SSE 9 | SSE 9 | — | N 7 | — | SSE 5 | S 3 | SW 3 | — | — | — | — | — | — | — |
| kJ | — | 24 | — | — | — | — | — | 35 | — | 16 | 44 | — | 34 | — | 4 | 4 | 2 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 21 | 32 | 0 | 0 | 0 | 0 | 19 | 34 | 14 | 14 | 1 | 0 | 0 | 0 | 1 | 100 | 103 | 100 | 38 | 38 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
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