Surf Forecasts:
Hapuna surf forecast from 21 Aug 2026:
- Best quality surf: Saturday 22 Aug, 11PM (local time) - 1.5ft (0.4m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 23 Aug, 8AM (local time) - 2ft (0.6m), 12s period, WNW swell with 109 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 11PM (local time) - 1.5ft (0.4m), 16s period with SW swell.
Best Forecast Surf Conditions for Hapuna this week:
The surf forecast for Hapuna over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 22) at 11PM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.4m and 16s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Hapuna in the next 16 days are 0.6m 12s and forecast to arrive on Sunday (Aug 23) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 6s period and expected on Saturday (Aug 22) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sat 22nd Aug) | 1.5ft (0.4m) 16s |
| Best Surf | 11PM (Sat 22nd Aug) | 1.5ft (0.4m) 16s |
| Most Powerful | 8AM (Sun 23rd Aug) | 2ft (0.6m) 12s |
Table - best surf conditions forecast for Hapuna over the next 16 days.
The Lowdown
Alright, crew, Rusty here with the Imperial take. So, this 16-day outlook for Hapuna is a real test of patience. The first worthwhile surf doesn’t turn up until Thursday, September 3rd, meaning we’ve got a pretty big gap of nearly two weeks with nothing but tiny, useless waves. For most of that time, we’re looking at swell heights of 0.7ft to 2ft, with combined wave energy stuck in the low double digits (like 87, 70, 14). It’s a flat spell, plain and simple.
Come September 3rd, we finally get a pulse. Hapuna is a sandbar break, and it’s fairly consistent when it gets swell, but this one’s a bit of a tease. The swell direction is from the WNW, which lines up well with the break’s optimum west swell. By Thursday afternoon, the swell lifts to 2ft with a very long period of 18 seconds. That’s proper groundswell—long waits between sets, but plenty of energy. The combined energy hits 380 (moderate), so there’s some grunt. The wind is light cross-onshore, which isn’t perfect, but it’s not blowing a gale.
The best of the bunch is Friday, September 4th. The morning brings a peak at 3ft from the WNW, with a 16-second period and a combined energy of 560 (moderate). The wind is still light cross-onshore, so the surf will be a little bumpy, but the size is the most we’ll see. That 3ft wave with a long period should offer some decent lines if you can find a clean peak. Crowds are possible here, so don’t be surprised if it’s not empty.
Water temp is 81°F, which is about 1°F above the norm for this time of year—nothing wild, just a little warmer than average.
So, bottom line: you’ll be waiting until the 3rd of September for the first real action, and the standout is the morning of the 4th of September with that 3ft WNW swell. It’s not a classic, but it’s the only game in town.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Fri morning, min 25°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 9mm), mostly falling on Sun night. Warm (max 28°C on Mon morning, min 25°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||
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) | SW 17 | SW 16 | SW 16 | W 11 | SW 16 | SW 15 | SW 16 | SW 15 | WNW 12 | WNW 11 | SSW 14 | SSW 13 | WNW 12 | WNW 11 | SSW 16 | SSW 16 | SSW 14 | SSW 15 | SSW 17 | SSW 16 |
Wave Graph  | ||||||||||||||||||||
 kJ | 47 | 69 | 69 | 59 | 64 | 37 | 63 | 58 | 78 | 46 | 20 | 18 | 14 | 12 | 25 | 24 | 21 | 21 | 27 | 26 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross-on | glassy | glassy | cross | cross-off | off | cross-off | glassy | glassy | cross-on | glassy | glassy | cross | cross-off | off | cross-off | cross-off | off |
High Tide | 12:08PM0.59m | 11:45PM0.18m | 1:04PM0.62m | 1:02AM0.20m | 1:49PM0.66m | 1:48AM0.23m | 2:26PM0.69m | 2:25AM0.28m | 2:59PM0.71m | 3:00AM0.33m | 3:28PM0.72m | 3:36AM0.38m | ||||||||
Low Tide | 3:32AM0.09m | 8:34PM0.15m | 8:53PM0.12m | 6:05AM0.06m | 9:13PM0.10m | 7:02AM0.04m | 9:33PM0.09m | 7:49AM0.01m | 9:53PM0.07m | 8:30AM0.00m | 10:13PM0.05m | |||||||||
 |  |  | |  | | | | |  |  | | | | |  | | | | | |
 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | 6:47 | — | — | 6:46 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — |
mm | — | — | — | — | — | — | — | — | — | 2 | 3 | — | 2 | — | — | 2 | — | — | — | — |
Temp °C | 28 | 28 | 29 | 29 | 27 | 29 | 29 | 27 | 27 | 27 | 26 | 28 | 28 | 27 | 28 | 28 | 26 | 27 | 28 | 26 |
Feels °C | 31 | 33 | 32 | 32 | 32 | 32 | 32 | 29 | 30 | 31 | 30 | 32 | 32 | 32 | 32 | 32 | 27 | 28 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | NNE 7 | NNE 7 | NNE 7 | NE 7 | NE 7 | NE 6 | NE 6 | WNW 11 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NNE 5 |
| kJ | 42 | 31 | 31 | 54 | 44 | 46 | 64 | 50 | 45 | 75 | 32 | 38 | 49 | 39 | 31 | 46 | 32 | 38 | 39 | 13 |
Swell 2 Height (m) Direction Period (s) | WNW 11 | W 10 | W 10 | W 11 | W 10 | WNW 10 | W 11 | WNW 10 | WNW 12 | WNW 11 | WNW 10 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 14 | SSW 15 | SSW 17 | SSW 13 |
| kJ | 23 | 35 | 52 | 59 | 50 | 33 | 57 | 32 | 78 | 46 | 9 | 18 | 35 | 32 | 30 | 14 | 21 | 21 | 27 | 17 |
Swell 3 Height (m) Direction Period (s) | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 16 | SW 15 | SW 15 | SSW 14 | SSW 14 | WNW 12 | WNW 12 | WNW 11 | SSW 16 | SSW 16 | SSW 12 | W 11 | SSW 14 | SSW 16 |
| kJ | 47 | 69 | 69 | 39 | 64 | 37 | 63 | 58 | 34 | 21 | 20 | 14 | 14 | 12 | 25 | 24 | 14 | 9 | 18 | 26 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | NE 6 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 52 | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 6 | 3 | 3 | 3 | 3 | 3 | 3 | 0 | 3 | 3 | 32 | 41 | 44 | 41 | 93 | 41 | 41 | 47 | 87 | 93 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Hapuna Surf forecast
The above surf forecast table for Hapuna provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Hapuna can be found by selecting the local surf guide option on the grey menu. Our Hapuna 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 (Hapuna) 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 Hapuna 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.
Hapuna is 84 km (52 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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