Surf Forecasts:
Kua Bay surf forecast from 31 Jul 2026:
- Most powerful swell: Friday 31 Jul, 11PM (local time) - 3.5ft (1.0m), 5s period, NE swell with 51 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 1.0m 5s and forecast to arrive on Friday (Jul 31) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 6s period and expected on Friday (Jul 31) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Fri 31st Jul) | 3.5ft (1.0m) 5s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright, Rusty here, and I’m not gonna sugarcoat it – the next couple of weeks are looking pretty darn flat. We’ve got a long dry spell on our hands, followed by a bit of a tease that never really delivers.
Right off the bat, it’s a dead zone. From Thursday the 30th of July all the way through to Saturday the 8th of August, the ocean is a ghost town. That’s a solid 10-day stretch with absolutely no surf to speak of. The wind is light, sometimes glassy, but without any swell, it doesn’t matter. Kua Bay is like a mirror. The water’s a warm 81°, which is average for the time of year, so that’s fine, but there’s nothing to ride.
Things start to perk up a little around Sunday the 9th of August. A long-period groundswell from the west starts to show, with a period of 15 seconds and some moderate energy building (201). But the wind is still a bit messy, and the swell is tiny, only about 2ft. It’s not worth the effort.
The one and only standout in this whole outlook is a very short window on Sunday afternoon, the 9th of August. The wind goes glassy, and the swell ticks up to 2ft from the west, with a very long period of 15 seconds. The combined energy hits 233, which is the best we’ll get. This is a long-period groundswell, so it’s got some punch. Kua Bay is exposed to the west-northwest, which is a good match. For that one afternoon, the water is clean and glassy. It’s small, knee-high at best, but it’s the only time the forecast calls for “good surf conditions.” This is your chance to get a few clean, rolling waves.
The rest of the second week into Monday the 14th of August is a letdown. The swell hangs around 2ft to 3ft, with moderate energy (hitting 315 on the 12th), but the wind is always a little cross or cross-onshore, leaving the conditions “marginal” or “very ordinary.” The long-period swell (12-15 seconds) is better suited to a point or reef, which Kua Bay is, so that helps a little. But the quality just isn’t there.
If you’re itching to get wet, keep your eyes on Sunday the 9th of August afternoon. That’s your one and only shot at anything decent. For the rest of it, it’s a waiting game. Forecasts can change, but right now, this is a quiet stretch.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Fri morning, min 25°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Sun afternoon, min 25°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Thu 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | ||||||||||||||
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) | SW 18 | SW 16 | SW 16 | N 9 | N 8 | N 8 | SW 14 | N 11 | N 10 | N 9 | N 9 | W 11 | NNE 6 | W 12 | N 6 | NE 6 | ENE 10 | NE 6 | W 11 | NE 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 49 | 41 | 0 | 6 | 5 | 5 | 29 | 9 | 16 | 15 | 6 | 10 | 0 | 11 | 7 | 0 | 0 | 15 | 10 | 0 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross-on | cross | glassy | glassy | glassy | glassy | cross-on | cross | glassy | cross-on | cross | glassy | cross-on | cross | glassy | glassy | on | 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 | 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 | — | — | 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 | 27 | 28 | 28 | 26 | 27 | 27 | 26 | 28 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 |
Feels °C | 29 | 30 | 31 | 31 | 29 | 30 | 29 | 27 | 30 | 29 | 29 | 29 | 28 | 29 | 30 | 28 | 29 | 30 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | NE 7 | NE 6 | NE 6 | NE 6 | SW 15 | NE 6 | NE 8 | SW 14 | NNE 6 | NE 8 | NNE 6 | N 6 | NNE 6 | NNE 6 | ENE 11 | NE 6 | NNE 5 | NE 9 | W 11 | NNE 4 |
| kJ | 54 | 45 | 43 | 75 | 55 | 70 | 116 | 47 | 37 | 110 | 30 | 22 | 31 | 20 | 47 | 40 | 17 | 21 | 10 | 6 |
Swell 2 Height (m) Direction Period (s) | SW 18 | SW 16 | SW 16 | SW 15 | N 8 | SW 14 | SW 14 | N 11 | NE 8 | N 9 | NE 8 | NE 8 | NE 8 | ENE 12 | NE 6 | ENE 11 | ENE 10 | W 12 | NNE 9 | NE 4 |
| kJ | 49 | 41 | 65 | 60 | 5 | 49 | 29 | 9 | 35 | 15 | 33 | 31 | 17 | 56 | 8 | 45 | 38 | 11 | 8 | 4 |
Swell 3 Height (m) Direction Period (s) | SSW 12 | SSW 12 | ENE 8 | N 9 | S 12 | N 8 | E 14 | E 14 | N 10 | SSW 13 | N 9 | W 11 | ENE 12 | W 12 | N 6 | SSW 11 | SSW 11 | NNE 9 | SSW 11 | NE 8 |
| kJ | 28 | 14 | 6 | 6 | 3 | 5 | 4 | 4 | 16 | 17 | 6 | 10 | 15 | 11 | 7 | 13 | 12 | 8 | 11 | 11 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NE 6 | — | — | NE 8 | — | — | — | — | — | — | — | — | — | NE 6 | NNE 9 | — |
| kJ | — | — | — | — | 73 | — | — | 86 | — | — | — | — | — | — | — | — | — | 15 | 52 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 97 | 14 | 100 | 39 | 14 | 4 | 4 | 4 | 100 | 100 | 4 | 101 | 101 | 51 | 97 | 97 | 19 | 97 | 97 | 19 |
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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