Surf Forecasts:
Kua Bay surf forecast from 30 Jul 2026:
- Most powerful swell: Thursday 30 Jul, 2PM (local time) - 1ft (0.3m), 18s period, SW swell with 49 kJ wave energy.
Best Forecast Surf Conditions for Kua Bay this week:
The most powerful waves expected at Kua Bay in the next 16 days are 0.3m 18s and forecast to arrive on Thursday (Jul 30) at 2PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Saturday (Aug 01) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Thu 30th Jul) | 1ft (0.3m) 18s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s break down what’s happening for Kua Bay over the next couple of weeks.
Right off the bat, we’ve got lean times. The first week and a half is pretty much a write-off for any real surfing. From Thursday, July 30th right through to Saturday, August 8th, it’s a long stretch of tiny, weak swells and poor conditions. The water is a warm 81°, which is about average for this time of year, so that’s one small comfort. But the energy is barely there – we’re looking at combined energy figures as low as 3 and 14, which is nothing. Even with some glassy mornings, the swell is just too small to do anything with. It’s a frustrating wait.
Things finally start to show a pulse on Sunday, August 9th. The morning goes glassy with a 2 ft swell from the west, and the combined energy climbs to 148. It’s still not pumping, but it’s surfable. The real standout, though, is Monday, August 10th. That morning is the pick of the entire forecast. We’ve got a clean 2 ft west swell with a solid 14-second period, and a light cross-offshore wind from the SSW. The combined energy jumps to 234 – that’s a noticeable step up in power. It’s a proper groundswell window, and the conditions are looking clean and lined up. This is the one to pencil in.
After that, the swell sticks around at around 2 ft to 3 ft, but the wind gets trickier. The morning of Thursday, August 14th has a 3 ft west swell with 14-second periods and energy at 264, but the wind is cross-shore, so it won’t be as tidy. The real close-out to the forecast is Friday, August 14th afternoon. The swell hits 3 ft from the west, period drops to 14 seconds, and the combined energy rockets up to 329. The wind goes glassy from the NNW. That’s a strong finish – the biggest and cleanest wave of the whole run, but it’s still a modest 3 ft, and it’s over a week away, so keep your fingers crossed.
For the best on offer, you’re looking at the morning of Monday, August 10th for the best combo of power and clean conditions. Friday, August 14th afternoon is the biggest and glassiest, but it’s a long-range call. The rest of the time, you’re mostly waiting.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Thu afternoon, min 25°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Sun morning, min 26°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | |||||||||||||||
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) | N 7 | SW 18 | SW 16 | N 9 | N 9 | NNE 6 | NNE 7 | SW 14 | N 11 | N 9 | N 6 | N 9 | W 11 | NE 8 | NE 9 | W 11 | ENE 11 | W 12 | W 12 | W 13 | W 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 3 | 49 | 41 | 14 | 13 | 44 | 0 | 29 | 9 | 16 | 19 | 6 | 10 | 0 | 0 | 9 | 0 | 12 | 11 | 13 | 32 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | off | cross-on | cross-on | cross | glassy | cross-on | glassy | on | cross | glassy | cross-on | cross-on | cross-off | cross-on | cross | glassy | cross-on | cross | glassy |
High Tide | 4:45PM0.81m | 4:57AM0.44m | 5:12PM0.77m | 5:39AM0.48m | 5:39PM0.72m | 6:24AM0.51m | 6:05PM0.65m | 7:15AM0.55m | 6:33PM0.57m | 8:16AM0.59m | 7:03PM0.49m | 9:30AM0.63m | 7:38PM0.40m | ||||||||
Low Tide | 9:46AM0.07m | 11:35PM0.12m | 10:24AM0.11m | 11:59PM0.11m | 11:05AM0.16m | 00:23AM0.10m | 11:52AM0.22m | 00:48AM0.09m | 12:48PM0.28m | 1:18AM0.09m | 2:06PM0.34m | 1:54AM0.09m | 4:10PM0.36m | 2:41AM0.10m | |||||||
 | |  |  | | | | | | | | | | |  | | | | | | | |
 | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — |
 | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:59 | — | — | 6:58 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 28 | 27 | 27 | 28 | 27 | 28 | 27 | 26 | 28 | 27 | 26 | 27 | 26 | 26 | 27 | 28 | 26 | 27 | 28 | 26 |
Feels °C | 30 | 30 | 30 | 30 | 31 | 30 | 31 | 28 | 29 | 30 | 29 | 29 | 29 | 28 | 30 | 29 | 31 | 27 | 32 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | NNE 7 | NE 6 | NE 6 | NE 6 | SW 15 | SW 15 | NNE 7 | NE 7 | NE 8 | NNE 6 | NE 8 | NNE 6 | NE 7 | NNE 6 | NNE 6 | ENE 11 | NNE 5 | NE 10 | NE 5 | NE 6 | NE 5 |
| kJ | 21 | 70 | 46 | 43 | 60 | 55 | 50 | 140 | 86 | 34 | 53 | 42 | 51 | 21 | 19 | 47 | 19 | 98 | 14 | 20 | 13 |
Swell 2 Height (m) Direction Period (s) | NE 7 | SW 18 | SW 16 | SW 16 | N 9 | ENE 8 | ENE 8 | SW 14 | SW 14 | NE 8 | NE 6 | NE 8 | W 11 | NE 8 | NE 9 | NNE 6 | ENE 11 | W 12 | NE 9 | NE 9 | W 13 |
| kJ | 14 | 49 | 41 | 65 | 13 | 13 | 46 | 29 | 47 | 35 | 19 | 33 | 10 | 32 | 19 | 11 | 46 | 12 | 21 | 12 | 32 |
Swell 3 Height (m) Direction Period (s) | N 7 | SSW 12 | SSW 12 | N 9 | S 12 | N 8 | SW 14 | E 14 | N 11 | N 9 | N 6 | N 9 | N 8 | ENE 12 | ENE 12 | W 11 | SSW 11 | N 10 | W 12 | W 13 | NE 8 |
| kJ | 3 | 28 | 15 | 14 | 11 | 5 | 49 | 4 | 9 | 16 | 19 | 6 | 5 | 15 | 29 | 9 | 12 | 8 | 11 | 13 | 11 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NE 6 | NNE 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 64 | 44 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 97 | 97 | 4 | 100 | 100 | 4 | 4 | 101 | 4 | 100 | 100 | 14 | 98 | 137 | 19 | 97 | 97 | 14 | 97 | 100 | 4 |
Best forecast wave conditions in Big Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Kua Bay Surf forecast
The above surf forecast table for Kua Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kua Bay can be found by selecting the local surf guide option on the grey menu. Our Kua Bay 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 (Kua Bay) 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 Kua Bay 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.
Kua Bay is 97 km (60 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.
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