Surf Forecasts:
How big are the waves at Mahai'ula Bay today (07 Sep):
- Afternoon surf: Afternoon surf (07 Sep, local time) - 4.5ft (1.4m), 11s period with SW swell.
- Evening surf: Evening surf (07 Sep, local time) - 10ft (3.0m), 14s period with SW swell.
The current surf forecast for Mahai'ula Bay at 10PM is: 3.0m 14s primary swell from a Southwest direction (forecast issued at 07:00pm September 07). An open ocean swell of 1.2m 15s is not directed at the surf break, a second open ocean swell of 2.1m 7s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (07 Sep) | - | - |
| Afternoon (07 Sep) | 4.5ft (1.4m) | 11s |
| Evening (07 Sep) | 10ft (3.0m) | 14s |
Table - waves today at Mahai'ula Bay. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 18mm), heaviest on Wed night. Warm (max 29°C on Mon night, min 26°C on Wed night). Winds decreasing (fresh winds from the S on Mon night, calm by Wed morning). | |||||||||||||||||||
Mon 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||||
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) | SW 14 | SW 14 | SW 14 | WSW 13 | SW 12 | SW 11 | WSW 11 | W 10 | W 10 | WNW 9 | WNW 9 | WNW 8 | WNW 8 | WNW 8 | WNW 7 | W 6 | WNW 6 | SSW 13 | SSW 13 |
Wave Graph  | |||||||||||||||||||
 kJ | 1533 | 2483 | 5015 | 3666 | 3060 | 2253 | 1724 | 650 | 426 | 265 | 166 | 113 | 67 | 40 | 27 | 12 | 15 | 0 | 0 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-off | cross-off | cross-off | glassy | glassy | on | on | cross-on | cross-on | on |
High Tide | 1:57AM0.40m | 2:18PM0.82m | 2:40AM0.48m | 2:55PM0.80m | |||||||||||||||
Low Tide | 8:41PM0.12m | 7:21AM0.09m | 9:06PM0.09m | 8:14AM0.08m | 9:31PM0.07m | ||||||||||||||
 |  | | | |  | | | |  | | | | | |  | |  | | |
 | — | — | — | — | 6:09 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — |
 | 6:34 | — | — | — | — | — | — | — | 6:32 | — | — | — | — | — | — | — | 6:31 | — | — |
mm | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | — | — | — | 1 | 1 | 1 | 1 |
Temp °C | 29 | 29 | 28 | 28 | 28 | 28 | 29 | 29 | 28 | 28 | 27 | 27 | 27 | 27 | 28 | 28 | 27 | 27 | 26 |
Feels °C | 32 | 30 | 27 | 27 | 27 | 27 | 29 | 29 | 29 | 31 | 31 | 31 | 32 | 32 | 32 | 31 | 30 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | WSW 13 | SW 12 | SW 11 | WSW 11 | W 10 | SSW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 7 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 |
| kJ | 1533 | 2483 | 5015 | 3666 | 3060 | 2253 | 1724 | 650 | 360 | 297 | 232 | 186 | 129 | 102 | 326 | 257 | 253 | 232 | 229 |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | W 10 | WNW 9 | WNW 9 | SSW 14 | SSW 14 | SSW 14 | SW 7 | SSW 7 | SW 7 | SSW 7 | NE 7 |
| kJ | 636 | 629 | 621 | 715 | 612 | 588 | 543 | 456 | 426 | 265 | 166 | 431 | 346 | 336 | 77 | 46 | 50 | 32 | 41 |
Swell 3 Height (m) Direction Period (s) | NNE 7 | NE 7 | NE 12 | NE 12 | NE 12 | NE 11 | NE 11 | NE 12 | SSW 14 | SSW 14 | SSW 14 | WNW 8 | WNW 8 | WNW 8 | WNW 7 | W 6 | WNW 6 | NE 7 | SSW 7 |
| kJ | 34 | 25 | 87 | 67 | 66 | 82 | 79 | 84 | 449 | 443 | 437 | 113 | 67 | 40 | 27 | 12 | 15 | 27 | 32 |
Wind waves Height (m) Direction Period (s) | S 7 | S 7 | S 8 | S 6 | — | — | SSW 9 | SSW 9 | — | — | — | — | — | — | — | — | — | — | SSW 4 |
| kJ | 352 | 412 | 195 | 164 | — | — | 456 | 463 | — | — | — | — | — | — | — | — | — | — | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 34 | 36 | 36 | 4 | 14 | 54 | 58 | 26 | 57 | 57 | 57 | 4 | 0 | 0 | 0 | 1 | 100 | 101 | 100 |
Best forecast wave conditions in Big Island | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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