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Manini Beach surfForecast / HAW – Big Island / USA
12 Day Weather and Surf, issued 1 am Tuesday 16 Sep 2025 HST
Best Forecast Surf Conditions for Manini Beach this week:
The surf forecast for Manini Beach over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 16) at 8AM. The primary swell is predicted to be 0.4m and 12s period with a secondary swell of 0.2m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Manini Beach in the next 12 days are 0.9m 16s and forecast to arrive on Saturday (Sep 20) at 11AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Tue 16th Sep) | 1.5ft (0.4m) 12s |
| Best Surf | 8AM (Fri 19th Sep) | 1.5ft (0.4m) 19s |
| Most Powerful | 11AM (Sat 20th Sep) | 3ft (0.9m) 16s |
Table - best surf conditions forecast for Manini Beach over the next 12 days.
Short Range Forecast Mostly dry. Warm (max 27°C on Tue morning, min 26°C on Tue morning). Wind will be generally light. | Days 3-6 Weather Summary Light rain (total 9mm), mostly falling on Sun night. Warm (max 27°C on Fri morning, min 25°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | |||||||||||||||
| 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) (?) | 13 | 13 | 12 | 12 | 15 | 15 | 14 | 14 | 13 | 19 | 18 | 16 | 16 | 15 | 14 | 14 | 13 | 13 | 12 | 12 | 12 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 66 | 57 | 46 | 48 | 57 | 55 | 53 | 51 | 70 | 118 | 243 | 298 | 446 | 417 | 371 | 232 | 201 | 181 | 87 | 86 | 82 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | on | cross- on | on | glass | cross- on | on | glass | glass | on | on | glass | on | cross- on | glass | cross- on | cross- on | on | on | glass | cross |
High Tide / height (m) | 1:13PM 0.65 | 1:01AM 0.31 | 1:53PM 0.66 | 1:47AM 0.37 | 2:25PM 0.66 | 2:25AM 0.44 | 2:53PM 0.65 | 3:00AM 0.49 | 3:18PM 0.62 | 3:35AM 0.54 | 3:40PM 0.59 | 4:09AM 0.57 | 4:03PM 0.56 | 4:43AM 0.59 | |||||||
Low Tide / height (m) | 8:25PM 0.15 | 6:35AM 0.06 | 8:41PM 0.12 | 7:29AM 0.04 | 8:59PM 0.10 | 8:13AM 0.03 | 9:17PM 0.08 | 8:52AM 0.04 | 9:37PM 0.06 | 9:29AM 0.06 | 9:56PM 0.04 | 10:06AM 0.08 | 10:17PM 0.03 | ||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | |||||||||||||||
| Sunrise | 6:11 | - | - | 6:11 | - | - | 6:11 | - | - | 6:11 | - | - | 6:11 | - | - | 6:11 | - | - | 6:11 | - | - |
| Sunset | - | 6:24 | - | - | 6:23 | - | - | 6:22 | - | - | 6:22 | - | - | 6:21 | - | - | 6:20 | - | - | 6:20 | - |
 | |  | | |  | | | | | | | |  | | |  |  | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2 | 7 | 1 | 1 | 5 |
| Temp. °C | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 27 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 26 | 25 |
| Feels °C (?) | 28 | 29 | 28 | 29 | 29 | 30 | 29 | 29 | 30 | 29 | 30 | 31 | 30 | 30 | 31 | 30 | 29 | 29 | 29 | 29 | 28 |
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Recent Eyeball Surf Reports for HAW - Big Island
Continuing clean conditions at Manini Beach (calm at Napo‘opo‘o wx 2 km from Manini Beach). 0.8m 13s groundswell from the SSW with a 0.4m 8s swell from the SSE and a 0.3m 15s groundswell from the SSW. 3 swells combining to make bigger set waves.
1 h 26 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 Manini Beach 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 Manini Beach Surf forecast
The above surf forecast table for Manini Beach provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Manini Beach can be found by selecting the local surf guide option on the grey menu. Our Manini Beach 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 (Manini Beach) 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 Manini Beach 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.
Manini Beach is 92 km (57 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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