Surf Forecasts:
How big are the waves at Mahai'ula Bay today (20 Oct):
- Morning surf: Morning surf (20 Oct, local time) - 1ft (0.3m), 16s period with SW swell.
- Afternoon surf: Afternoon surf (20 Oct, local time) - 1.5ft (0.4m), 3s period with W swell.
- Evening surf: Evening surf (20 Oct, local time) - 1ft (0.3m), 3s period with WNW swell.
The current surf forecast for Mahai'ula Bay at 1AM is: 0.2m 2s primary swell from a West-northwest direction (forecast issued at 07:00pm October 19). An open ocean swell of 0.9m 7s is not directed at the surf break, a second open ocean swell of 0.3m 11s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Oct) | 1ft (0.3m) | 16s |
| Afternoon (20 Oct) | 1.5ft (0.4m) | 3s |
| Evening (20 Oct) | 1ft (0.3m) | 3s |
Table - waves today at Mahai'ula Bay. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 27°C on Tue morning, min 24°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Mon 19 | Tuesday 20 | Wednesday 21 | |||||||||||||||||
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) | NW 12 | SW 16 | SW 16 | WNW 2 | NNE 7 | SW 16 | NNE 7 | W 3 | SW 14 | WNW 3 | SW 15 | SW 16 | SW 16 | SW 16 | SSW 2 | SW 2 | SW 15 | SW 15 | SW 15 |
Wave Graph  | |||||||||||||||||||
 kJ | 36 | 0 | 0 | 1 | 0 | 40 | 0 | 2 | 32 | 2 | 37 | 40 | 39 | 39 | 1 | 1 | 0 | 0 | 0 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | off | off | cross-off | cross-off | glassy | on | cross | cross-off | cross-off | glassy | glassy | glassy | cross-on | cross-on | glassy | glassy | cross |
High Tide | 00:30AM0.36m | 11:51AM0.63m | 1:04AM0.45m | 12:33PM0.62m | |||||||||||||||
Low Tide | 6:40PM0.17m | 4:58AM0.27m | 6:59PM0.14m | 6:14AM0.25m | 7:18PM0.11m | ||||||||||||||
 |  | | | | | |  | | | | | | | | | |  | | |
 | — | — | — | — | 6:20 | — | — | — | — | — | — | — | 6:20 | — | — | — | — | — | — |
 | 5:57 | — | — | — | — | — | — | — | 5:57 | — | — | — | — | — | — | — | 5:55 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 26 | 26 | 25 | 26 | 27 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 25 | 25 |
Feels °C | 30 | 29 | 29 | 29 | 27 | 28 | 30 | 28 | 29 | 27 | 26 | 28 | 28 | 27 | 27 | 28 | 29 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 8 | NNE 8 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 |
| kJ | 101 | 86 | 84 | 81 | 96 | 91 | 91 | 99 | 81 | 105 | 93 | 79 | 72 | 72 | 70 | 70 | 70 | 47 | 47 |
Swell 2 Height (m) Direction Period (s) | S 12 | S 12 | S 11 | S 11 | SW 16 | S 11 | S 11 | S 11 | S 11 | SW 15 | S 11 | S 13 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 |
| kJ | 44 | 44 | 23 | 21 | 65 | 21 | 21 | 37 | 21 | 56 | 21 | 29 | 39 | 39 | 60 | 56 | 54 | 54 | 54 |
Swell 3 Height (m) Direction Period (s) | NW 12 | SW 16 | SW 16 | SW 16 | S 11 | SW 16 | SW 16 | SSW 14 | SW 14 | S 11 | SW 15 | SW 16 | S 12 | S 12 | S 12 | S 12 | S 12 | S 11 | SSE 11 |
| kJ | 36 | 61 | 63 | 64 | 21 | 40 | 63 | 19 | 32 | 21 | 37 | 40 | 27 | 27 | 26 | 25 | 24 | 23 | 24 |
Wind waves Height (m) Direction Period (s) | — | — | — | WNW 2 | — | — | SSE 5 | W 3 | WNW 3 | WNW 3 | WNW 3 | — | — | S 4 | SSW 2 | SW 2 | — | — | — |
| kJ | — | — | — | 1 | — | — | 5 | 2 | 3 | 2 | 1 | — | — | 1 | 1 | 1 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 100 | 11 | 1 | 1 | 1 | 1 | 1 | 100 | 105 | 1 | 38 | 23 |
Best forecast wave conditions in Big Island | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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