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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
12 Day Weather and Surf, issued 1 am Sunday 31 Aug 2025 HST
Best Forecast Surf Conditions for Mahai'ula Bay this week:
The most powerful waves expected at Mahai'ula Bay in the next 12 days are 0.4m 14s and forecast to arrive on Tuesday (Sep 02) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 16s period and expected on Saturday (Sep 06) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Tue 2nd Sep) | 1.5ft (0.4m) 14s |
Table - best surf conditions forecast for Mahai'ula Bay over the next 12 days.
Short Range Forecast Light rain (total 2mm), mostly falling on Sun night. Warm (max 26°C on Sun morning, min 24°C on Mon night). Wind will be generally light. | Days 3-6 Weather Summary Mostly dry. Warm (max 27°C on Fri morning, min 24°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 31 | Monday 01 | Tuesday 02 | Wednesday 03 | Thursday 04 | Friday 05 | Saturday 06 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 18 | 13 | 16 | 17 | 16 | 16 | 15 | 2 | 13 | 13 | 12 | 12 | 11 | 11 | 11 | 7 | 18 | 16 | 15 | 9 | 14 |
Wave (?)Graph  | |||||||||||||||||||||
| Energy (?) | 0 | 0 | 0 | 0 | 0 | 0 | 34 | 1 | 63 | 58 | 52 | 22 | 20 | 19 | 18 | 0 | 0 | 0 | 0 | 6 | 0 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross- on | cross- on | cross | cross- on | on | on | cross- off | cross- on | on | glass | cross- on | cross- on | glass | cross- on | cross- on | on | cross- on | cross | cross- on |
High Tide / height (m) | 10:45AM 0.61 | 11:59AM 0.65 | 11:48PM 0.26 | 12:52PM 0.70 | 12:58AM 0.29 | 1:33PM 0.75 | 1:42AM 0.34 | 2:09PM 0.79 | 2:20AM 0.40 | 2:42PM 0.81 | 2:58AM 0.47 | 3:14PM 0.81 | 3:36AM 0.55 | ||||||||
Low Tide / height (m) | 3:03AM 0.18 | 8:28PM 4:43AM 0.23 0.17 | 8:34PM 0.19 | 5:58AM 0.14 | 8:49PM 0.16 | 6:56AM 0.11 | 9:08PM 0.13 | 7:45AM 0.09 | 9:29PM 0.10 | 8:32AM 0.07 | 9:51PM 0.07 | ||||||||||
Sunday 31 | Monday 01 | Tuesday 02 | Wednesday 03 | Thursday 04 | Friday 05 | Saturday 06 | |||||||||||||||
| Sunrise | 6:07 | - | - | 6:07 | - | - | 6:07 | - | - | 6:09 | - | - | 6:09 | - | - | 6:09 | - | - | 6:09 | - | - |
| Sunset | - | 6:39 | - | - | 6:38 | - | - | 6:37 | - | - | 6:37 | - | - | 6:36 | - | - | 6:36 | - | - | 6:35 | - |
 | |  | | |  |  | | | | | | | |  | | | | | | | |
Rain (mm) | - | - | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 25 | 25 | 27 | 27 | 26 | 26 | 27 | 26 |
| Feels °C (?) | 30 | 28 | 28 | 29 | 29 | 27 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 28 | 28 | 28 | 28 | 28 | 28 |
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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
Continuing clean conditions at Mahai'ula Bay (calm at Palani Junction wx 11 km from Mahai'ula Bay). No surfable waves
Actual: 44 min ago
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Mahai'ula Bay surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Mahai'ula Bay Surf forecast
The above surf forecast table for Mahai'ula Bay provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Mahai'ula Bay can be found by selecting the local surf guide option on the grey menu. Our Mahai'ula Bay surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Mahai'ula Bay) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Mahai'ula Bay may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Mahai'ula Bay is 100 km (62 miles) from Hilo. If you plan a vacation in Big Island, look for hotels and other accommodation in Hilo. Hilo has rooms for a wide range of budgets as well as car hire and transport links.
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