Surf Forecasts:
Hakalau surf forecast from 31 Aug 2026:
- Most powerful swell: Monday 7 Sep, 8AM (local time) - 11ft (3.5m), 12s period, NE swell with 3,493 kJ wave energy.
Best Forecast Surf Conditions for Hakalau this week:
The most powerful waves expected at Hakalau in the next 16 days are 3.5m 12s and forecast to arrive on Monday (Sep 07) 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 0.2m 9s period and expected on Monday (Aug 31) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Mon 7th Sep) | 11ft (3.5m) 12s |
Table - best surf conditions forecast for Hakalau over the next 16 days.
The Lowdown
Alright, folks, Rusty here with the look ahead for our local stretch. We’ve got a bit of a slow start, and then things get interesting. Let’s get into it.
Right now, we’re looking at a couple of days where the surf is just not happening. Monday the 31st and Tuesday the 1st, the wave energy is weak at best, and what’s there is blown out by onshore winds. Not worth paddling out. Wednesday the 2nd is much the same – poor conditions and small, short-period junk. It’s a quiet start to the forecast window.
Come Thursday the 3rd, we start to see a bit more energy, but the wind is still cross-onshore and the combo of moderate swell (7ft from the East) with a short 9-second period makes it a messy affair. The next few days, Friday the 4th, Saturday the 5th, and Sunday the 6th, are more of the same story – building swell but the wind angles aren't doing us any favours. The wave energy climbs into the four-digit range (1491 to 2397), but it’s cross-onshore and choppy. For an intermediate surfer, it’s not great. For a kite surfer, that’s a different story – the beach setup would be interesting with that crosswind.
Now, here’s where things get exciting. Monday the 7th is the standout you’ve been waiting for. By the afternoon, the wind swings around to a clean cross-offshore from the NW, and we’ve got a solid 16ft groundswell from the NE with a very long 12-second period. The wave energy is absolutely pumping at 7335. That’s proper, powerful stuff. This is a river break (Hakalau), and long-period groundswell loves a river mouth – expect better shape and more orderly lines, but those waves are going to be big and powerful. This is expert territory at that size; beginners, sit this one out.
The next day, Tuesday the 8th, the swell drops back to 8ft but the wind switches back to a messy cross-shore, making it a whole lot less appealing. The window from Wednesday the 9th through to Monday the 14th continues with onshore or cross-onshore winds, moderate swell, and short periods. The consistent theme here is poor to marginal surf.
The last couple of days, the 15th, the swell fades right back down to 4ft to 5ft with no decent wind to clean it up. The window closes with a whimper.
So, to sum it up: get your solid board ready for Monday afternoon, September 7th. That’s the one to circle on the calendar. It’s a long-range call, so it’s always a bit of a gamble that far out, but the signs are promising for a serious session at Hakalau. The rest is a struggle against the wind.
Stay tuned, and I’ll see you out there.
Rusty
Short Range ForecastHeavy rain (total 23mm), heaviest during Wed morning. Warm (max 26°C on Mon morning, min 25°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Thu night. Warm (max 27°C on Sat afternoon, min 25°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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) | NE 8 | NE 8 | ENE 8 | ENE 8 | ENE 8 | NE 8 | ENE 8 | ESE 9 | ESE 10 | E 9 | E 8 | E 8 | E 8 | E 13 | E 13 | ENE 13 | ENE 13 | ENE 13 | ENE 13 | ENE 13 | ENE 12 |
Wave Graph | |||||||||||||||||||||
291 | 378 | 476 | 403 | 356 | 282 | 330 | 326 | 544 | 708 | 616 | 481 | 634 | 1491 | 1400 | 1723 | 1697 | 2224 | 2165 | 2356 | 2694 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | on | on | cross-on | cross | cross-off |
High Tide | 4:27PM0.77m | 5:40AM0.81m | 4:48PM0.69m | 6:40AM0.80m | 5:04PM0.62m | 8:05AM0.79m | 4:48PM0.54m | 9:58AM0.81m | 11:26AM0.87m | 10:20PM0.42m | 12:22PM0.94m | 11:59PM0.48m | |||||||||
Low Tide | 10:43AM0.31m | 10:56PM0.12m | 11:32AM0.40m | 11:27PM0.12m | 12:38PM0.49m | 00:07AM0.15m | 3:14PM0.54m | 1:05AM0.18m | 2:41AM0.20m | 7:30PM0.39m | 4:27AM0.19m | 7:35PM0.33m | |||||||||
6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | |
— | 6:36 | — | — | 6:35 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | |
mm | — | 2 | 4 | 2 | — | 4 | 5 | 3 | 3 | 1 | — | 5 | 2 | — | — | — | — | 4 | 2 | 1 | 1 |
Temp °C | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 27 | 26 | 26 | 26 | 26 |
Feels °C | 27 | 27 | 28 | 29 | 28 | 29 | 28 | 27 | 28 | 25 | 25 | 26 | 26 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | NE 8 | E 9 | ENE 8 | ENE 8 | ENE 8 | NE 8 | ENE 8 | ESE 9 | ESE 10 | E 9 | E 12 | NNE 7 | E 8 | E 13 | E 13 | ENE 13 | ENE 13 | ENE 13 | ENE 13 | ENE 13 | ENE 12 |
291 | 44 | 476 | 403 | 356 | 282 | 330 | 326 | 544 | 708 | 196 | 99 | 634 | 1491 | 1400 | 1723 | 1697 | 2224 | 2165 | 2356 | 2694 | |
Swell 2 Height (m) Direction Period (s) | E 9 | S 9 | SSE 9 | ESE 11 | ESE 10 | ESE 9 | ESE 9 | NE 8 | NE 8 | SSE 11 | SSE 12 | E 13 | S 14 | S 13 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SE 10 | SE 10 | SE 10 |
43 | 7 | 8 | 47 | 57 | 71 | 186 | 229 | 200 | 215 | 153 | 336 | 4 | 3 | 37 | 36 | 36 | 36 | 24 | 24 | 24 | |
Swell 3 Height (m) Direction Period (s) | ESE 9 | SE 13 | SE 12 | SSE 9 | E 14 | E 13 | E 14 | E 13 | E 13 | E 12 | NW 10 | S 10 | S 16 | S 16 | N 12 | NNE 11 | NNE 10 | NNE 10 | N 10 | N 10 | NW 16 |
8 | 7 | 6 | 8 | 15 | 31 | 102 | 219 | 212 | 150 | 4 | 80 | 5 | 5 | 11 | 23 | 35 | 37 | 19 | 17 | 10 | |
Wind waves Height (m) Direction Period (s) | — | NE 8 | — | — | — | — | — | — | — | — | E 8 | E 8 | — | — | — | — | — | — | — | — | N 10 |
— | 378 | — | — | — | — | — | — | — | — | 616 | 481 | — | — | — | — | — | — | — | — | 8 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 96 | 96 | 95 | 20 | 95 | 14 | 20 | 96 | 20 | 20 | 20 | 95 | 20 | 20 | 14 | 20 | 20 | 14 | 120 | 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.











