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Mahai'ula Bay Surf Forecast
/ HAW – Big Island (60 breaks) / Hawaii (267 breaks) /
Surf Forecasts:
Mahai'ula Bay surfForecast / HAW – Big Island / USA
48hr Weather and Surf, issued 7 pm Wednesday 17 Sep 2025 HSTForecast update in hr min s Forecast update imminent
Mahai'ula Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Mahai'ula Bay sea temperature is
27.2° C
(Which is normal for this time of year)| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Sep) | - | - |
| Afternoon (17 Sep) | 1ft (0.3m) | 3s |
| Evening (17 Sep) | - | - |
Table - waves today at Mahai'ula Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||||||||
| 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 | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 15 | 3 | 15 | 15 | 5 | 5 | 2 | 3 | 3 | 14 | 5 | 13 | 13 | 13 | 19 | 18 | 18 | 18 | 12 | 16 | 16 | 16 | 16 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 0 | 1 | 0 | 0 | 7 | 7 | 1 | 2 | 2 | 0 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 24 | 0 | 0 | 0 | 0 | 22 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | on | cross- on | glass | glass | cross- on | cross- on | cross- on | glass | glass | glass | glass | glass | cross- on | cross- on | cross- on | glass | glass | cross | glass | cross | cross- on | cross- on |
High Tide / height (m) | 1:54AM 0.41 | 2:04PM 0.75 | 2:30AM 0.48 | 2:38PM 0.74 | 3:03AM 0.55 | |||||||||||||||||||
Low Tide / height (m) | 8:28PM 0.13 | 7:14AM 0.13 | 8:51PM 0.11 | 8:04AM 0.12 | 9:12PM 0.09 | 8:48AM 0.12 | ||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:11 | - | - | - | - | - | - | - | 6:11 | - | - | - | - | - | - | - | 6:11 | - | - |
| Sunset | 6:24 | - | - | - | - | - | - | - | 6:23 | - | - | - | - | - | - | - | 6:22 | - | - | - | - | - | - | - |
 |  | | | |  | | |  |  | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 27 | 26 | 25 | 25 | 25 | 26 | 27 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 27 | 27 | 27 | 26 | 26 | 25 | 25 | 26 | 27 | 26 |
| Feels °C (?) | 28 | 28 | 28 | 28 | 28 | 29 | 30 | 28 | 28 | 30 | 29 | 29 | 29 | 29 | 30 | 29 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 28 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for HAW - Big Island
Still cross-shore at Mahai'ula Bay (light winds from the SW at Kailua/Kona Airport 6 km from Mahai'ula Bay). 0.2m 2s local chop from the WSW to make surfable waves.
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1 h 59 min ago
17 km/h
SW
Cross-Shore
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