
Surf Forecasts:
Hapuna surf forecast from 9 Aug 2026:
- Most powerful swell: Wednesday 12 Aug, 2PM (local time) - 1ft (0.3m), 13s period, WNW swell with 34 kJ wave energy.
Best Forecast Surf Conditions for Hapuna this week:
The most powerful waves expected at Hapuna in the next 16 days are 0.3m 13s and forecast to arrive on Wednesday (Aug 12) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 8s period and expected on Saturday (Aug 15) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Wed 12th Aug) | 1ft (0.3m) 13s |
Table - best surf conditions forecast for Hapuna over the next 16 days.
The Lowdown
Alright folks, Rusty here, and I’ve got the lowdown on Hapuna. Let’s be straight up: this outlook is a long stretch of flatness and small, weak waves. Don't expect much, but let's walk through it.
The water is sitting at a warm 81°, which is pretty much normal for this time of year—nothing crazy to report there.
Right out of the gate, it’s a quiet start. For the first several days, we’re looking at tiny, weak surf. On Saturday the 8th, there’s barely a ripple at 0.7 ft with a super long period of 18 seconds, but the energy is a paltry 48. That’s not enough to get excited about, and the wind is cross-offshore but the size just isn’t there. This same story runs through the middle of the month. Morning and afternoon sessions from the 9th through the 14th show wave heights stuck at 0.7 ft to 1.0 ft, mostly from the west, with periods that are all over the place. The combined swell energy is weak, often less than 100—like 28, 25, or even 8 on the 11th. The only silver lining is that the winds are often light and cross-offshore, keeping the surface clean, but you can’t surf what isn’t there.
We do get a minor bump in energy around the 16th of August, where the swell picks up to 3 ft from the SSW, and the combined energy hits 179. That’s a moderate pulse, but the period drops to 10 seconds and it’s onshore wind. The surf quality is still flagged as poor. It’s a bit more interesting, but not worth paddling out for.
The last week of the forecast shows a bit more life. Around the 21st and 22nd, we see waves of 2 ft to 2 ft from the west, with combined energy tipping over 100—123 on the 21st morning, and 110 on the 22nd morning. That’s moderate energy at best. The real highlight here is the wind. We get glassy conditions on the 21st afternoon and 22nd morning, which is a major positive for clean surf. The period is a short 10 seconds, so it’s not groundswell, but if you’re desperate for a longboard or a foamy, that’s your window. Still, the size is tiny.
The standout: Honestly, the only window that’s worth a mention is August 21st afternoon and August 22nd morning at Hapuna. The swell is 2 ft to 2 ft from the west, and with glassy conditions, it’ll look like a mill pond. It’s not going to be pumping, but it’ll be clean. The combined energy is moderate (103 to 110), so there’s a little push. Just don’t expect any barrels.
Other than that, it’s a flat grind. The spot is fairly consistent, but this run is a dud. Forecasts can change though.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Sun afternoon. Warm (max 29°C on Sat afternoon, min 25°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Tue afternoon, min 25°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | ||||||||||||||
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 18 | SSW 18 | W 13 | W 12 | W 12 | W 11 | W 11 | SSW 15 | W 10 | W 10 | SSW 13 | W 11 | WNW 13 | SSW 16 | W 12 | NE 6 | W 12 | W 11 | W 12 | W 12 |
Wave Graph | ||||||||||||||||||||
31 | 30 | 28 | 25 | 23 | 21 | 21 | 23 | 8 | 8 | 0 | 22 | 33 | 0 | 25 | 0 | 11 | 10 | 11 | 11 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-on | cross | glassy | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off |
High Tide | 1:00AM0.19m | 2:08PM0.80m | 2:05AM0.23m | 2:55PM0.83m | 2:57AM0.27m | 3:37PM0.84m | 3:45AM0.33m | 4:16PM0.81m | 4:30AM0.38m | 4:52PM0.76m | 5:16AM0.44m | 5:25PM0.69m | ||||||||
Low Tide | 8:57PM0.09m | 6:24AM-0.04m | 9:32PM0.05m | 7:27AM-0.07m | 10:05PM0.02m | 8:23AM-0.08m | 10:36PM0.00m | 9:15AM-0.06m | 11:06PM-0.01m | 10:03AM-0.03m | 11:35PM-0.01m | 10:52AM0.02m | 00:02AM-0.01m | |||||||
— | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | |
6:55 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | |
mm | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 27 | 28 | 28 | 27 | 29 | 29 | 26 | 28 | 29 | 26 | 28 | 29 | 26 | 28 | 28 | 26 | 28 | 29 | 27 |
Feels °C | 31 | 30 | 31 | 32 | 31 | 31 | 31 | 28 | 30 | 30 | 29 | 27 | 30 | 28 | 28 | 27 | 27 | 27 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | NE 10 | NE 6 | NE 7 | NE 6 | NE 5 | NE 6 | NE 6 | NE 6 | NE 7 | NNE 6 | NNE 7 | NE 5 | NNE 6 | NE 6 | NNE 6 | NE 6 | NE 6 | SSW 14 | NE 7 | SSW 14 |
15 | 40 | 46 | 46 | 29 | 33 | 58 | 31 | 16 | 39 | 18 | 27 | 39 | 33 | 40 | 73 | 52 | 41 | 111 | 36 | |
Swell 2 Height (m) Direction Period (s) | SSW 18 | SSW 18 | W 13 | W 12 | W 12 | W 11 | SSW 15 | W 10 | SSW 14 | SSW 14 | NE 5 | SSW 13 | SSW 13 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | W 11 | SSW 14 | W 12 |
31 | 30 | 28 | 25 | 23 | 21 | 47 | 18 | 41 | 40 | 5 | 32 | 32 | 51 | 48 | 44 | 70 | 10 | 40 | 11 | |
Swell 3 Height (m) Direction Period (s) | SSW 13 | SSW 13 | NE 9 | NE 9 | SSW 12 | SSW 12 | W 11 | SSW 15 | W 10 | W 10 | SSW 13 | W 11 | WNW 13 | SSW 13 | W 12 | SSW 12 | W 12 | S 18 | W 12 | W 15 |
17 | 17 | 13 | 12 | 14 | 14 | 21 | 23 | 8 | 8 | 35 | 22 | 33 | 32 | 25 | 28 | 11 | 6 | 11 | 5 | |
Wind waves Height (m) Direction Period (s) | NE 5 | — | — | — | — | — | — | — | NNE 5 | — | — | — | — | — | — | — | — | NE 6 | — | NE 6 |
29 | — | — | — | — | — | — | — | 17 | — | — | — | — | — | — | — | — | 80 | — | 80 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 41 | 32 | 93 | 87 | 41 | 93 | 96 | 41 | 87 | 32 | 45 | 41 | 93 | 45 | 93 | 41 | 32 | 41 | 41 | 41 |
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.











