Surf Forecasts:
How big are the waves at Mahai'ula Bay today (17 Oct):
- Morning surf: Morning surf (17 Oct, local time) - 1ft (0.3m), 11s period with NNW swell.
- Afternoon surf: Afternoon surf (17 Oct, local time) - 1ft (0.3m), 11s period with NNW swell.
- Evening surf: Evening surf (17 Oct, local time) - 1ft (0.3m), 11s period with NNW swell.
The current surf forecast for Mahai'ula Bay at 9PM is: 0.3m 11s primary swell from a North-northwest direction and 0.2m 4s secondary swell from a South-southwest direction (forecast issued at 01:00pm October 17). An open ocean swell of 0.9m 6s is not directed at the surf break, a second open ocean swell of 0.6m 13s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Oct) | 1ft (0.3m) | 11s |
| Afternoon (17 Oct) | 1ft (0.3m) | 11s |
| Evening (17 Oct) | 1ft (0.3m) | 11s |
Table - waves today at Mahai'ula Bay. (Swell directed towards the surf break)
Short Range ForecastSome drizzle, heaviest during Sat night. Warm (max 27°C on Sat afternoon, min 25°C on Sat night). Wind will be generally light. | |||||||||||||||||||||
Sat 17 | Sunday 18 | Monday 19 | |||||||||||||||||||
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) | SSW 4 | NNW 11 | NNW 11 | NNW 11 | NW 15 | NW 15 | NW 16 | NW 16 | NW 14 | NW 14 | NW 14 | NW 14 | NW 13 | NW 13 | NW 13 | SW 17 | NW 12 | NW 12 | NW 12 | NNE 7 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2 | 23 | 23 | 23 | 57 | 60 | 64 | 61 | 52 | 51 | 51 | 46 | 44 | 44 | 42 | 45 | 37 | 37 | 36 | 0 | 0 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | glassy | off | off | cross-off | glassy | glassy | cross-on | glassy | cross-off | glassy | cross-off | cross-off | glassy | glassy | cross-on | glassy | glassy | cross |
High Tide | 8:42AM0.63m | 9:17PM0.25m | 9:57AM0.62m | 11:40PM0.30m | 11:01AM0.62m | ||||||||||||||||
Low Tide | 5:46PM0.23m | 00:59AM0.23m | 6:18PM0.20m | 3:07AM0.27m | 6:40PM0.17m | ||||||||||||||||
 | | |  |  | |  |  | | | | | | | | | | | | | | |
 | — | — | — | — | — | — | 6:18 | — | — | — | — | — | — | — | 6:20 | — | — | — | — | — | — |
 | — | — | 5:59 | — | — | — | — | — | — | — | 5:58 | — | — | — | — | — | — | — | 5:57 | — | — |
mm | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 27 | 26 | 26 | 26 | 25 | 26 | 27 | 27 | 27 | 26 | 26 | 25 | 26 | 26 | 27 | 26 | 26 | 26 | 26 |
Feels °C | 30 | 30 | 30 | 29 | 29 | 28 | 26 | 28 | 30 | 30 | 30 | 28 | 30 | 26 | 28 | 29 | 30 | 29 | 29 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | NNE 5 | NNE 5 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 7 | NNE 7 | NNE 6 | NNE 6 | NNE 6 | NNE 7 | NNE 7 | NNE 7 | S 12 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 7 |
| kJ | 33 | 30 | 49 | 51 | 37 | 29 | 34 | 68 | 77 | 58 | 75 | 85 | 83 | 75 | 81 | 69 | 88 | 99 | 101 | 101 | 81 |
Swell 2 Height (m) Direction Period (s) | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 12 | S 12 | S 12 | S 12 | S 12 | NW 12 | S 12 | S 12 | S 12 | S 12 | S 11 |
| kJ | 96 | 131 | 127 | 123 | 121 | 121 | 121 | 83 | 82 | 112 | 73 | 72 | 45 | 44 | 44 | 38 | 44 | 45 | 44 | 44 | 23 |
Swell 3 Height (m) Direction Period (s) | S 10 | NNW 11 | NNW 11 | NNW 11 | NW 15 | NW 15 | NW 16 | NW 16 | NW 14 | NW 14 | NW 14 | NW 14 | NW 13 | NW 13 | NW 13 | SW 17 | NW 12 | NW 12 | NW 12 | SW 16 | SW 16 |
| kJ | 32 | 23 | 23 | 23 | 57 | 60 | 64 | 61 | 52 | 51 | 51 | 46 | 44 | 44 | 42 | 45 | 37 | 37 | 36 | 61 | 63 |
Wind waves Height (m) Direction Period (s) | SSW 4 | — | SSW 4 | SSW 4 | SSW 4 | SSE 5 | SSW 2 | — | — | — | — | — | — | — | — | NNE 7 | — | NW 4 | WSW 2 | SSE 5 | — |
| kJ | 2 | — | 1 | 2 | 2 | 7 | 1 | — | — | — | — | — | — | — | — | 81 | — | 1 | 1 | 2 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 4 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 103 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 103 | 1 | 1 | 1 |
Best forecast wave conditions in Big Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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