
Surf Forecasts:
Hakalau surf forecast from 12 Sep 2026:
- Best quality surf: Monday 14 Sep, 5AM (local time) - 3ft (0.9m), 8s period, NE swell with glassy winds.
- Most powerful swell: Thursday 17 Sep, 5PM (local time) - 8ft (2.4m), 10s period, E swell with 1,124 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 5AM (local time) - 3ft (0.9m), 8s period with NE swell.
Best Forecast Surf Conditions for Hakalau this week:
The surf forecast for Hakalau over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 14) at 5AM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.7m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Hakalau in the next 16 days are 2.4m 10s and forecast to arrive on Thursday (Sep 17) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 18s period and expected on Friday (Sep 18) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 14th Sep) | 3ft (0.9m) 8s |
| Best Surf | 5AM (Mon 14th Sep) | 3ft (0.9m) 8s |
| Most Powerful | 5PM (Thu 17th Sep) | 8ft (2.4m) 10s |
Table - best surf conditions forecast for Hakalau over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s look at what’s shaping up for Hakalau over the next couple of weeks. Gotta be straight with you – it’s a tough stretch. We’ve got a bit of a wait for anything that even whispers "surfable."
The first real chance to get wet isn't until Monday the 14th of September, and even then, it’s a pretty ordinary little pulse. The water temperature is sitting at 81°F, which is about average for this time of year, so at least the wait won’t be a cold one.
The week starts with nothing doing. Friday the 11th and the weekend are basically write-offs with meager, weak energy from the ENE on Friday, and conditions staying poor. Saturday and Sunday see a bit of bump from the NNE, but it’s all messy and cross-onshore, with energy barely registering. Not worth paddling out.
Finally, Monday morning the 14th brings a slight glimmer. We’re looking at a small 2ft wave from the NE, and the key here is the wind: glassy! Absolutely dead calm. That’s a major positive for a spot that often sees some breeze. The period is only 8 seconds though, so it’s weak, short-period windswell, and the combined energy is low. You’ll be scratching for scraps, but if you’ve got a log and want a peaceful session with no crowds, this is your window. That same afternoon the wind shifts onshore and it’s back to junk.
The middle of the week gets a little more size, but the quality tanks. Tuesday the 15th is choppy and messy. Wednesday the 16th sees the swell bump up to 5ft in the morning and 6ft in the afternoon from the east, but combined energy jumps up and the wind is all wrong – cross-onshore with rain and even a risk of thunderstorms. The water is going to be a washing machine.
Thursday the 17th is the biggest call of the period, but it’s a tough one. The swell hits 7ft in the morning and 8ft in the afternoon, straight from the east with a 10-second period. The combined energy is strong, over 1000. For an exposed river mouth, that’s going to be a lot of moving water, definitely a session for experienced surfers only. Problem is, the wind is a steady cross-onshore and we’ve got thunderstorm risks. It’s marginal, not clean.
From there, the outlook gets bleak again. The pulse holds around 5ft to 7ft through the following week, but it’s all cross-onshore and choppy with poor conditions dominating. By the time we get to Saturday the 26th of September, a long-period 14-second groundswell shows up from the NNW, with very strong energy, but the wind is howling cross-onshore from the SE, making it a complete mess for paddle surfing. With that much chop and those conditions, it looks more like a kite-surfing setup than a clean wave for a board.
So, what’s the standout? Honestly, there’s only one real highlight, and it’s a small one. Monday morning, September 14th at Hakalau. The swell is tiny at 2ft from the NE, but the wind is glassy. If you want a clean, easy-going session on the longboard, that’s your moment. For anything bigger, the winds just ruin it.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Mon morning, min 24°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 24mm), heaviest during Wed night. Warm (max 27°C on Tue morning, min 25°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Fri 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | ||||||||||||||
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) | ENE 11 | ENE 10 | ENE 10 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | NE 8 | NE 8 | NE 8 | NE 8 | E 11 | E 7 | E 11 | E 8 | E 8 | ENE 8 | E 10 | E 10 | E 9 |
Wave Graph | ||||||||||||||||||||
240 | 169 | 123 | 94 | 121 | 121 | 121 | 102 | 70 | 69 | 108 | 92 | 116 | 382 | 294 | 397 | 629 | 980 | 1124 | 893 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | on | on | on | cross-on | cross-on | glassy | on | glassy | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on |
High Tide | 3:08PM0.91m | 3:37AM0.85m | 3:32PM0.84m | 4:14AM0.87m | 3:53PM0.76m | 4:51AM0.86m | 4:11PM0.69m | 5:32AM0.83m | 4:23PM0.62m | 6:19AM0.78m | 4:21PM0.56m | 7:27AM0.73m | ||||||||
Low Tide | 9:26PM0.12m | 9:35AM0.22m | 9:48PM0.11m | 10:14AM0.28m | 10:11PM0.11m | 10:54AM0.36m | 10:33PM0.13m | 11:37AM0.43m | 10:56PM0.16m | 12:34PM0.50m | 11:23PM0.20m | 11:57PM0.25m | ||||||||
— | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
6:25 | — | — | 6:25 | — | — | 6:24 | — | — | 6:23 | — | — | 6:22 | — | — | 6:22 | — | — | 6:21 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | 3 | 2 | 2 | 10 | 5 | 3 | 7 |
Temp °C | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 |
Feels °C | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 29 | 28 | 30 | 29 | 29 | 29 | 30 | 29 | 29 | 30 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | ENE 11 | ENE 10 | ENE 10 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | NE 8 | NE 5 | ENE 6 | NE 8 | ESE 7 | E 7 | E 11 | E 8 | E 8 | ENE 8 | E 10 | E 10 | E 9 |
240 | 169 | 123 | 94 | 121 | 121 | 121 | 102 | 39 | 55 | 108 | 77 | 113 | 382 | 294 | 397 | 629 | 980 | 1124 | 893 | |
Swell 2 Height (m) Direction Period (s) | NNE 8 | NNE 8 | NNE 8 | ENE 9 | SE 9 | ENE 8 | SE 8 | ESE 8 | NE 8 | NE 8 | E 12 | NNE 8 | E 11 | NNE 7 | E 11 | NNE 9 | SSE 11 | SSE 10 | SSE 10 | S 15 |
51 | 44 | 78 | 84 | 28 | 48 | 53 | 43 | 70 | 69 | 74 | 76 | 116 | 43 | 108 | 15 | 12 | 10 | 10 | 4 | |
Swell 3 Height (m) Direction Period (s) | SE 8 | SE 8 | SE 8 | SE 8 | NW 9 | SE 8 | ENE 8 | ENE 5 | SE 8 | SE 8 | SE 8 | E 11 | NE 7 | SE 9 | NNE 8 | SSE 11 | S 13 | SSE 10 | S 14 | SSE 10 |
24 | 23 | 16 | 15 | 3 | 24 | 39 | 9 | 22 | 15 | 14 | 92 | 27 | 19 | 19 | 12 | 3 | 10 | 4 | 9 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | ENE 9 | ENE 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | 106 | 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 20 | 14 | 20 | 20 | 20 | 20 | 122 | 14 | 0 | 122 | 0 | 20 | 74 | 2 | 74 | 20 | 20 | 20 | 96 | 14 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Hakalau Surf forecast
The above surf forecast table for Hakalau provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Hakalau can be found by selecting the local surf guide option on the grey menu. Our Hakalau 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 (Hakalau) 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 Hakalau 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.
Hakalau is 21 km (13 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.










