Surf Forecasts:
Manini Beach surf forecast from 5 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 5AM (local time) - 2.5ft (0.8m), 18s period, S swell with glassy winds.
- Most powerful swell: Wednesday 12 Aug, 8AM (local time) - 3.5ft (1.0m), 18s period, S swell with 627 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 8PM (local time) - 1.5ft (0.4m), 15s period with SW swell.
Best Forecast Surf Conditions for Manini Beach this week:
The surf forecast for Manini Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 05) at 8PM. The primary swell is predicted to be 0.4m and 15s period with a secondary swell of 0.4m and 11s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Manini Beach in the next 16 days are 1.0m 18s and forecast to arrive on Wednesday (Aug 12) at 8AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 7s period and expected on Friday (Aug 07) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Wed 5th Aug) | 1.5ft (0.4m) 15s |
| Best Surf | 5AM (Wed 12th Aug) | 2.5ft (0.8m) 18s |
| Most Powerful | 8AM (Wed 12th Aug) | 3.5ft (1.0m) 18s |
Table - best surf conditions forecast for Manini Beach over the next 16 days.
The Lowdown
Alright, surf’s finally starting to show a bit of life after a flat spell. It’s been a slow one, but there are a few windows coming up that are worth your time. Let’s break it down.
The next few days are gonna be a grind. We’re looking at small, weak surf with a lot of poor conditions. Don’t get too worked up about the start of this run. It’s not until we get to the weekend that things start to get interesting.
Saturday, August 8th marks the first real shift. The swell starts to fill in a little, and by the afternoon, we get some glassy conditions at Manini Beach (Big Island) . It’s still pretty small, around 1.3ft, but the clean, glassy surface is a huge plus. The wave energy is starting to build, but it’s still nothing to write home about. Sunday afternoon is similar—a bit more size at 1.6ft, still glassy, and the energy is picking up. It’s surfable, but you’ll be working for it.
The real standout looks like it’s shaping up for Wednesday, August 12th. The swell is pushing to a solid 3.3ft with a period over 17 seconds—that’s some proper groundswell. The morning is still a bit wonky, but the afternoon glass-off looks like the best bet of the week. The energy is strong, and the surf quality is expected to be very good. This is the day to clear your schedule. It’s still a beginner-friendly size, but the power and shape should be there. The only caveat is the long period—it might break a bit straight on a beach break, but on the reef, it should be beautiful.
After that, we get a few days of consistent, but not spectacular, surf in the 3.3ft range through to the 14th. The wind isn’t perfect, but it’s manageable. It’s more of a “get your fix” kind of surf than a standout.
The second week is looking thinner. We drop back down to smaller, weaker swells with more of a west in the mix. There’s a bit of a pulse on the 19th and 20th, but it’s inconsistent and the energy is much lower. The 20th could see another glassy afternoon, but don’t hold your breath for anything epic.
So, to sum it up: The pick of the bunch is definitely the afternoon of Wednesday, August 12th. The long-period south swell and glassy winds are the perfect combo for Manini’s reef. The weekend before that is a good warm-up, but nothing more. The rest is just waiting and watching.
Stay stoked.
Short Range ForecastMostly dry. Warm (max 28°C on Thu morning, min 26°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Mon afternoon. Warm (max 28°C on Sat morning, min 26°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SSW 11 | SW 15 | SW 14 | SW 14 | SW 14 | SSW 14 | SSW 16 | SW 20 | SW 19 | SW 18 | SSW 18 | SSW 18 | SSW 18 | S 16 | S 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | S 19 |
Wave Graph  | |||||||||||||||||||||
 kJ | 46 | 57 | 37 | 31 | 52 | 80 | 50 | 98 | 95 | 106 | 124 | 109 | 103 | 135 | 186 | 314 | 240 | 174 | 276 | 269 | 365 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross | cross-on | cross-on | glassy | on | on | cross-on | on | glassy | glassy | on | glassy | glassy | on | cross-on | glassy | on | cross-on | cross-on |
High Tide | 9:39AM0.48m | 7:14PM0.39m | 11:25AM0.53m | 12:43PM0.60m | 10:26PM0.28m | 1:38PM0.67m | 00:26AM0.29m | 2:23PM0.73m | 1:37AM0.32m | 3:04PM0.76m | 2:32AM0.37m | 3:42PM0.77m | 3:21AM0.41m | ||||||||
Low Tide | 3:16PM0.29m | 3:03AM0.03m | 4:16AM0.02m | 8:41PM0.23m | 5:33AM-0.00m | 8:55PM0.19m | 6:41AM-0.03m | 9:21PM0.15m | 7:39AM-0.06m | 9:49PM0.12m | 8:30AM-0.07m | 10:18PM0.10m | |||||||||
 | |  |  | |  | | | | | | | |  | | |  |  | | | | |
 | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — |
 | — | 6:57 | — | — | 6:57 | — | — | 6:55 | — | — | 6:55 | — | — | 6:54 | — | — | 6:54 | — | — | 6:53 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | 3 | 3 | — | 1 | 3 |
Temp °C | 27 | 27 | 27 | 28 | 28 | 27 | 27 | 28 | 27 | 28 | 27 | 27 | 28 | 27 | 27 | 28 | 27 | 27 | 27 | 28 | 27 |
Feels °C | 30 | 31 | 32 | 31 | 32 | 30 | 30 | 31 | 30 | 31 | 30 | 31 | 32 | 31 | 32 | 32 | 31 | 32 | 29 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SW 14 | SSW 14 | S 11 | SSW 10 | SW 13 | S 14 | SSW 18 | SSW 13 | SSW 13 | S 16 | S 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 |
| kJ | 46 | 45 | 37 | 19 | 52 | 80 | 20 | 37 | 46 | 106 | 124 | 99 | 96 | 135 | 186 | 314 | 240 | 174 | 276 | 269 | 239 |
Swell 2 Height (m) Direction Period (s) | S 12 | S 12 | S 12 | SW 14 | SSW 10 | S 11 | SW 14 | SW 20 | SW 19 | SW 18 | SW 13 | SW 17 | SSW 18 | SSW 12 | SSW 12 | WNW 11 | SSW 11 | S 11 | S 21 | SSW 20 | S 19 |
| kJ | 26 | 26 | 25 | 31 | 19 | 21 | 29 | 98 | 95 | 83 | 43 | 77 | 103 | 85 | 56 | 40 | 42 | 63 | 81 | 133 | 365 |
Swell 3 Height (m) Direction Period (s) | W 13 | SW 15 | SW 14 | W 12 | W 12 | W 12 | SSW 16 | SSW 16 | SSW 15 | SSW 10 | SSW 10 | SSW 18 | SW 16 | W 12 | WNW 12 | S 9 | W 11 | WNW 10 | WNW 12 | WNW 10 | WNW 12 |
| kJ | 29 | 57 | 33 | 26 | 27 | 11 | 50 | 50 | 42 | 19 | 19 | 109 | 67 | 25 | 45 | 15 | 21 | 21 | 14 | 22 | 46 |
Wind waves Height (m) Direction Period (s) | — | — | — | S 4 | SSW 3 | — | — | — | NW 3 | — | — | — | — | NW 3 | — | — | S 9 | — | SW 10 | WNW 12 | — |
| kJ | — | — | — | 1 | 1 | — | — | — | 3 | — | — | — | — | 2 | — | — | 14 | — | 35 | 53 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 97 | 97 | 15 | 97 | 97 | 0 | 23 | 97 | 18 | 97 | 0 | 0 | 93 | 0 | 0 | 138 | 138 | 0 | 97 | 141 | 62 |
Best forecast wave conditions in Big Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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 16 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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