Surf Forecasts:
Hakalau surf forecast from 17 Aug 2026:
- Best quality surf: Monday 24 Aug, 2AM (local time) - 7ft (2.1m), 9s period, E swell with glassy winds.
- Most powerful swell: Monday 24 Aug, 2PM (local time) - 8ft (2.4m), 9s period, E swell with 915 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 5AM (local time) - 3.5ft (1.1m), 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 19) at 5AM. The primary swell is predicted to be 1.1m and 8s period with a secondary swell of 0.6m and 7s. 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 9s and forecast to arrive on Monday (Aug 24) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 13s period and expected on Sunday (Aug 23) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 19th Aug) | 3.5ft (1.1m) 8s |
| Best Surf | 2AM (Mon 24th Aug) | 7ft (2.1m) 9s |
| Most Powerful | 2PM (Mon 24th Aug) | 8ft (2.4m) 9s |
Table - best surf conditions forecast for Hakalau over the next 16 days.
The Lowdown
Alright, let me tell you how it’s looking for Hakalau over the next couple of weeks. Honestly, it’s a bit of a rough stretch. The first week or so isn’t offering much for a traditional paddle surfer, but there are a few windows later that might get the heart rate up if you’re patient and willing to deal with some messy conditions.
For the immediate future, from August 17th through about the 20th, we’ve got tiny to small waves – we’re talking 2ft to 5ft – coming mostly from the east with a short, weak period around 6 to 8 seconds. The combined swell energy is weak, ranging from 130 to 318 units, so there’s just not much power in the water. Winds are mostly onshore or cross-on from the east and northeast, and often there’s rain or clouds. The water temp is sitting at 81°F, which is pretty normal for Hakalau this time of year – no crazy anomaly there. The surf quality is poor, so don’t expect much.
Now, after that quiet spell, things start to pick up in size, but the quality remains a major question mark. From around August 22nd, we see a slow build in swell size. By the 23rd and 24th, we’re looking at 7ft to 8ft east swell with periods stretching to 9-10 seconds. The combined energy jumps into the moderate to strong range (720 to 822 units), but the wind is either onshore or cross-on from the northeast and east, keeping things choppy. The morning of the 24th is a little interesting – 7ft from the ESE with 10-second period and the winds are onshore but lighter – it’s rated as marginal, which means you might find a few if you’re keen, but it won’t be clean.
Here’s where it gets a bit more serious, but you’ll need to be an expert or at least very comfortable in heavy, messy water. From August 25th onwards, the swell really cranks up. We’re talking 8ft to 12ft east swell, and by the 27th of August, we’re looking at a solid 12ft with a 10-second period. The combined energy rockets up into the very strong range, hitting 3888 units on the 27th morning. But again, the wind is cross-on from the southeast and east – moderate breeze – making conditions poor to marginal. The afternoon of the 27th is a bit better with onshore wind, but it’s still a beast for experts only.
The real standout, if you can call it that, looks like the very end of the forecast – September 1st. We’ve got a powerful 12ft to 13ft east swell with an 11-second period. That’s proper groundswell energy, with combined energy readings of 2725 and 3709 units. This is big, strong stuff. However, the wind stays cross-on from the east at 20 km/h (12 mph), creating a moderate cross-onshore chop. For a river mouth break like Hakalau, a long-period east swell can set up well, but the onshore breeze will be a battle. This is for experienced surfers only – beginners should stay well clear.
So, in short: the first week is small and weak, the second week is big but rough. August 24th morning offers the best compromise of size and slightly lighter winds, but September 1st (Tuesday) is the biggest, most powerful swell of the window – if you’re an expert and don’t mind choppy conditions, that’s your shot. Crowds are possible at Hakalau, but with the wind and size, it might keep the numbers down. For the average surfer, this isn’t the best two weeks. The setup looks more interesting for kite surfing than paddle surfing on most days.
Rusty
Short Range ForecastLight rain (total 4mm), mostly falling on Mon morning. Warm (max 26°C on Mon afternoon, min 25°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Sat night. Warm (max 27°C on Fri morning, min 25°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
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 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 8 | ENE 7 | NE 7 | NNE 6 | SE 9 | SE 9 | ESE 8 | ESE 8 | E 8 | ESE 8 | E 9 | E 9 | E 9 | E 9 |
Wave Graph | |||||||||||||||||||||
265 | 234 | 207 | 229 | 235 | 160 | 156 | 181 | 157 | 112 | 48 | 49 | 46 | 62 | 235 | 343 | 354 | 736 | 702 | 755 | 780 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | on | on | cross-on | on | cross-on | glassy | on | cross-on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross-on | on | cross-on | glassy |
High Tide | 5:17PM0.70m | 7:10AM0.72m | 5:22PM0.62m | 8:33AM0.70m | 4:21PM0.56m | 10:31AM0.72m | 11:55AM0.77m | 12:41PM0.82m | 11:36PM0.43m | 1:15PM0.88m | 00:32AM0.48m | ||||||||||
Low Tide | 11:50AM0.42m | 00:03AM0.19m | 12:47PM0.51m | 00:34AM0.22m | 3:12PM0.56m | 1:17AM0.24m | 2:34AM0.27m | 4:18AM0.26m | 8:21PM0.39m | 5:31AM0.21m | 8:20PM0.36m | ||||||||||
6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | |
— | 6:46 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:44 | — | — | 6:43 | — | |
mm | 2 | 1 | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | 5 | 2 | 1 | — |
Temp °C | 25 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 26 | 25 | 25 |
Feels °C | 27 | 29 | 27 | 27 | 28 | 27 | 28 | 29 | 29 | 31 | 30 | 30 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 26 | 27 |
Swell 1 Height (m) Direction Period (s) | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 8 | ENE 7 | NE 7 | NNE 6 | NNE 7 | NE 7 | ESE 8 | ESE 8 | E 8 | ESE 8 | ESE 9 | E 9 | E 9 | E 9 |
265 | 234 | 207 | 229 | 235 | 160 | 156 | 181 | 157 | 112 | 48 | 38 | 36 | 62 | 235 | 343 | 354 | 405 | 702 | 755 | 780 | |
Swell 2 Height (m) Direction Period (s) | SE 11 | SE 11 | SE 10 | SE 10 | SE 10 | NNE 7 | NNE 7 | NNE 6 | SE 9 | SE 9 | E 8 | E 7 | SE 9 | NE 7 | NNE 6 | SSE 15 | NE 7 | NE 7 | SSE 14 | SSE 13 | NW 12 |
29 | 29 | 25 | 24 | 24 | 33 | 31 | 13 | 29 | 22 | 42 | 33 | 46 | 36 | 17 | 21 | 54 | 164 | 18 | 17 | 6 | |
Swell 3 Height (m) Direction Period (s) | S 14 | S 13 | S 13 | NNE 8 | NNE 8 | SE 10 | SE 9 | SE 9 | S 16 | ESE 9 | SE 9 | SE 9 | E 8 | NNE 7 | S 13 | S 12 | SSE 15 | SSE 14 | NW 13 | NW 12 | S 13 |
16 | 14 | 14 | 6 | 6 | 23 | 21 | 21 | 5 | 16 | 40 | 49 | 20 | 16 | 13 | 11 | 21 | 38 | 7 | 6 | 3 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NE 7 | — | — | — | — | — | — | — | E 6 | ESE 6 | — | — | — | E 9 | — | NNE 6 | — |
— | — | — | — | 53 | — | — | — | — | — | — | — | 30 | 40 | — | — | — | 736 | — | 40 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 20 | 20 | 14 | 20 | 20 | 14 | 20 | 74 | 0 | 20 | 20 | 16 | 20 | 20 | 16 | 156 | 74 | 20 | 74 | 76 | 0 |
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.











