
Surf Forecasts:
Hakalau surf forecast from 9 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 8AM (local time) - 4.5ft (1.4m), 8s period, E swell with glassy winds.
- Most powerful swell: Saturday 15 Aug, 5PM (local time) - 11ft (3.5m), 13s period, ENE swell with 4,323 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 8AM (local time) - 4.5ft (1.4m), 8s period with E 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 Wednesday (Aug 12) at 8AM. The primary swell is predicted to be 1.4m and 8s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Hakalau in the next 16 days are 3.5m 13s and forecast to arrive on Saturday (Aug 15) at 5PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 18s period and expected on Wednesday (Aug 12) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Wed 12th Aug) | 4.5ft (1.4m) 8s |
| Best Surf | 8AM (Wed 12th Aug) | 4.5ft (1.4m) 8s |
| Most Powerful | 5PM (Sat 15th Aug) | 11ft (3.5m) 13s |
Table - best surf conditions forecast for Hakalau over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's talk about what's on the cards for the next couple of weeks at Hakalau.
Honestly, the outlook is a bit of a mixed bag. We've got a long dry spell before anything really gets interesting. The first solid recommendation doesn't pop up until the 14th of August, so you're looking at a few days of pretty average conditions before that. From the 9th right through to the 13th, it's all poor surf with onshore winds and short-period, weak energy swell. Nothing to get excited about.
The first real glimmer of hope comes on Friday, August 14th. The morning sees a long-period groundswell start to show, with combined wave energy climbing to a moderate 777. Swell is from the ESE at 4.6 ft, but the period is a solid 11 seconds. It's a bit cross-on from the NE, but the setup looks like it could offer some clean, lined-up waves despite the tide. The afternoon is where it gets proper interesting though. The swell jumps to 7.2 ft from the east, still with that 11-second period, and the combined energy rockets to a strong 1152. The wind is a gentle cross-onshore breeze, so it's not perfect, but there's some serious grunt in the water. This is the best window we've got in the first week, but it's still a "marginal" call.
Saturday, August 15th, is a different story. The swell is massive, hitting 11.5 ft from the ENE with a period of 13 seconds and energy of 4368. That's serious power. But the wind is howling cross-shore at 15.5 mph, making it choppy and messy. This is big, strong, and ugly. Unless you're a real expert looking for a thrashing, this is more of a kite-surfing setup than a paddle-surfing one.
The best of the whole forecast, and the only true standout, is Sunday, August 16th. The swell holds at 11.5 ft from the NE, but the wind shifts to a clean, cross-offshore breeze from the NW at 12.5-15.5 mph. The period is a very long 12 seconds, and the combined energy is a massive 3378. This is groundswell at its finest. This is a big-wave day for experienced surfers only. The river mouth at Hakalau can handle a long-period swell like this, offering a proper, deep-water take-off. The water temp is about 80.4°F, which is bang on average for this time of year, so a thin suit is fine. Keep in mind, with a spot that's "fairly consistent" and crowds being "sometimes" an issue, a Sunday with this kind of quality is going to draw a crowd. Get there early.
After that, the following week from Monday, August 17th, through to the 24th, drops right off. The swell fades, the wind goes onshore again, and the energy drops to weak levels. There's a tiny pulse on the 20th with a 3.6 ft SE swell and a 11-second period, but it's still a "poor" call. By the 23rd, we see some bumpy, short-period swell from the SE, but it's messy with storm risk. It's a long wait for the next decent window, and with the general inconsistency, it's not unusual for this spot to have a blank run like this.
Stay safe out there.
Short Range ForecastLight rain (total 9mm), mostly falling on Sun afternoon. Warm (max 27°C on Sun morning, min 25°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Fri night. Warm (max 27°C on Thu morning, min 25°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | |||||||||||||||
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) | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | ESE 11 | E 11 | ENE 11 | ENE 11 | ENE 13 | ENE 13 |
Wave Graph | |||||||||||||||||||||
466 | 428 | 408 | 359 | 341 | 294 | 291 | 270 | 241 | 203 | 233 | 177 | 280 | 333 | 402 | 452 | 1122 | 1948 | 2816 | 4323 | 4090 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-on | on | cross-on | on | on | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off |
High Tide | 1:26PM1.03m | 00:41AM0.50m | 2:07PM1.08m | 1:36AM0.56m | 2:44PM1.09m | 2:25AM0.62m | 3:18PM1.08m | 3:10AM0.67m | 3:49PM1.03m | 3:54AM0.71m | 4:17PM0.96m | 4:38AM0.74m | 4:41PM0.88m | ||||||||
Low Tide | 8:27PM0.34m | 6:42AM0.04m | 8:55PM0.29m | 7:33AM0.01m | 9:23PM0.25m | 8:19AM0.02m | 9:51PM0.21m | 9:03AM0.06m | 10:18PM0.19m | 9:44AM0.13m | 10:44PM0.17m | 10:25AM0.22m | 11:10PM0.17m | ||||||||
5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | |
— | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:49 | — | |
mm | 2 | 3 | 3 | — | — | 1 | — | — | — | — | — | 1 | — | — | — | — | — | 7 | 3 | 1 | — |
Temp °C | 27 | 26 | 26 | 27 | 27 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 |
Feels °C | 29 | 27 | 29 | 28 | 28 | 28 | 27 | 27 | 26 | 27 | 26 | 26 | 28 | 27 | 28 | 28 | 27 | 29 | 27 | 27 | 25 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | E 8 | NNW 9 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | ESE 11 | E 11 | ENE 11 | ENE 11 | ENE 13 | ENE 13 |
466 | 428 | 408 | 359 | 341 | 15 | 291 | 270 | 241 | 203 | 233 | 177 | 280 | 333 | 402 | 452 | 1122 | 1630 | 2816 | 4323 | 4090 | |
Swell 2 Height (m) Direction Period (s) | NE 9 | NE 9 | NE 9 | NNW 10 | NNW 9 | SE 12 | NNW 8 | NNW 8 | NNW 8 | S 18 | S 18 | NE 6 | S 16 | S 15 | S 16 | NE 8 | SE 14 | SE 12 | SE 13 | SE 12 | SE 12 |
22 | 49 | 12 | 19 | 16 | 6 | 13 | 6 | 6 | 57 | 54 | 54 | 43 | 40 | 43 | 188 | 29 | 37 | 40 | 37 | 34 | |
Swell 3 Height (m) Direction Period (s) | N 6 | N 12 | NNW 11 | NE 9 | SE 12 | S 18 | S 16 | S 16 | S 20 | NNW 7 | NNW 7 | S 16 | NW 7 | NW 9 | ESE 14 | ESE 13 | S 14 | S 13 | S 16 | NNW 9 | S 18 |
1 | 3 | 23 | 12 | 6 | 6 | 5 | 5 | 30 | 5 | 5 | 46 | 2 | 3 | 19 | 137 | 16 | 14 | 20 | 8 | 24 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | E 8 | — | — | — | — | — | — | — | — | — | — | N 8 | ENE 11 | — | — | NW 8 |
— | — | — | — | — | 294 | — | — | — | — | — | — | — | — | — | — | 1 | 1948 | — | — | 3 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 18 | 20 | 14 | 158 | 95 | 95 | 20 | 158 | 14 | 158 | 160 | 95 | 158 | 95 | 14 | 98 | 95 | 14 | 72 | 72 | 72 |
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.











