
Surf Forecasts:
Hapuna surf forecast from 14 Sep 2026:
- Best quality surf: Friday 18 Sep, 2AM (local time) - 1.5ft (0.5m), 17s period, SW swell with offshore winds.
- Most powerful swell: Wednesday 16 Sep, 5PM (local time) - 1.5ft (0.5m), 18s period, SW swell with 152 kJ wave energy.
- Next surfable swell (1★+): Friday 18 Sep, 2AM (local time) - 1.5ft (0.5m), 17s 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 Friday (Sep 18) at 2AM. The primary swell is predicted to be 0.5m and 17s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Hapuna in the next 16 days are 0.5m 18s and forecast to arrive on Wednesday (Sep 16) at 5PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Thursday (Sep 17) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Fri 18th Sep) | 1.5ft (0.5m) 17s |
| Best Surf | 2AM (Fri 18th Sep) | 1.5ft (0.5m) 17s |
| Most Powerful | 5PM (Wed 16th Sep) | 1.5ft (0.5m) 18s |
Table - best surf conditions forecast for Hapuna over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on the cards for the next sixteen days.
Honestly, it’s a pretty flat run ahead. The first week or so at Hapuna is mostly a write-off – we’re looking at tiny dribbles of swell, mostly under 2ft, and that combined energy figure is barely creeping into triple digits for most of it. You’re going to be waiting a while. The water temp is sitting around average for this time of year, so nothing unusual there, just a normal September feel.
From Monday the 14th through to Thursday the 17th, it's all poor surf conditions with swell heights struggling to hit 2ft. You get some glassy afternoons, which is nice for a paddle, but there's just no push. The combined wave energy is weak – mostly in the 15 to 152 range – so it’s more of a lake than a surf zone.
Friday the 18th afternoon finally shows a glimmer: the swell bumps up to 2ft from the SW, period around 17 seconds, and the energy hits 153 (moderate). It's glassy too. You could probably get a few knee-high sliders on a longboard, but don’t expect much. That’s really the only highlight in the first full week.
After that, from Sunday the 20th through to the end of the month, it’s more of the same – tiny surf, mostly under 2ft, with occasional clean, glassy windows but no real power. The best afternoon might be Monday the 28th when the swell reaches 2ft from the WNW, period 15 seconds, and energy of 142. Still just "surfable but very ordinary."
So, to be straight with you: there’s no standout session in this entire 16-day outlook. If you’re desperate, Friday the 18th afternoon or Monday the 28th afternoon are your best bets, but only if you’re happy on a mid-length or log. Otherwise, we’re in a pretty flat spell.
- Rusty
Short Range ForecastMostly dry. Warm (max 30°C on Wed morning, min 25°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Thu afternoon. Warm (max 29°C on Fri morning, min 25°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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 14 | W 10 | SSW 22 | SSW 21 | SW 20 | SW 19 | SW 19 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 17 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 |
Wave Graph | |||||||||||||||||||
20 | 8 | 46 | 45 | 98 | 96 | 94 | 79 | 152 | 75 | 65 | 64 | 148 | 78 | 145 | 127 | 64 | 64 | 58 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | glassy | glassy | cross-on | glassy | off | cross-off | cross-off | cross-off | cross-on | cross-off | off | cross-on | glassy | glassy | cross-off | glassy | off |
High Tide | 6:08AM0.62m | 5:43PM0.39m | 6:50AM0.62m | 6:10PM0.32m | 7:39AM0.59m | 6:37PM0.25m | 8:41AM0.57m | 7:08PM0.20m | 10:00AM0.55m | 9:49PM0.17m | 11:20AM0.56m | 00:02AM0.19m | |||||||
Low Tide | 11:22PM-0.00m | 12:31PM0.14m | 11:45PM0.02m | 1:34PM0.18m | 00:09AM0.04m | 3:00PM0.20m | 00:37AM0.07m | 5:26PM0.20m | 1:16AM0.10m | 7:14PM0.16m | 2:31AM0.12m | 7:39PM0.13m | 4:23AM0.13m | ||||||
— | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | |
6:28 | — | 6:27 | — | — | 6:25 | — | — | 6:24 | — | — | 6:23 | — | — | 6:22 | — | — | 6:22 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — | 2 | — | — | — | — |
Temp °C | 26 | 28 | 29 | 27 | 29 | 29 | 27 | 30 | 30 | 27 | 28 | 28 | 27 | 29 | 28 | 26 | 28 | 29 | 26 |
Feels °C | 29 | 30 | 32 | 32 | 33 | 33 | 30 | 32 | 31 | 28 | 32 | 33 | 31 | 32 | 31 | 28 | 30 | 32 | 29 |
Swell 1 Height (m) Direction Period (s) | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NE 5 | NNE 4 | SW 18 | NNE 5 | SW 17 | NNE 7 | NE 7 | NNE 7 | NE 7 | NE 7 | NE 5 | NE 6 | NE 7 | NE 6 |
48 | 46 | 59 | 54 | 41 | 21 | 8 | 79 | 31 | 75 | 84 | 140 | 41 | 84 | 77 | 23 | 42 | 97 | 34 | |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SW 14 | SSW 22 | SSW 21 | SW 20 | NNE 8 | NNE 8 | NNE 7 | SW 18 | ENE 10 | ENE 9 | SW 16 | ENE 8 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 |
20 | 7 | 46 | 45 | 98 | 23 | 19 | 21 | 152 | 19 | 29 | 64 | 41 | 78 | 145 | 127 | 64 | 64 | 58 | |
Swell 3 Height (m) Direction Period (s) | W 11 | W 10 | SSW 14 | SSW 13 | NNE 10 | SW 19 | SW 19 | SW 8 | NNE 7 | NNE 8 | SW 16 | SSW 18 | SW 17 | SSW 17 | WSW 9 | NE 8 | NNE 7 | SSW 16 | ENE 8 |
9 | 8 | 18 | 17 | 9 | 96 | 94 | 3 | 10 | 12 | 65 | 33 | 148 | 28 | 8 | 17 | 5 | 49 | 14 | |
Wind waves Height (m) Direction Period (s) | NNE 4 | NNE 4 | — | — | — | — | — | NNE 5 | — | NNE 7 | — | — | — | — | — | — | — | — | — |
5 | 3 | — | — | — | — | — | 20 | — | 70 | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 41 | 87 | 87 | 41 | 3 | 3 | 3 | 6 | 6 | 3 | 84 | 3 | 0 | 3 | 0 | 3 | 32 | 60 | 32 |
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.










