
Surf Forecasts:
Kua Bay surf forecast from 21 Jul 2026:
- Most powerful swell: Saturday 25 Jul, 8PM (local time) - 2ft (0.6m), 5s period, NNE swell with 15 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 0.6m 5s and forecast to arrive on Saturday (Jul 25) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 8s period and expected on Friday (Jul 24) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Sat 25th Jul) | 2ft (0.6m) 5s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for the next couple of weeks.
To be honest, it’s a pretty slow start. We’re looking at a long stretch of very small, weak surf with hardly any energy behind it. The combined energy of all swells is basically zero for the first week and a half, so don’t bother waxing up just yet. There’s a gap of about ten days where there’s nothing worth paddling out for.
The first real hint of something surfable shows up on Saturday, the 1st of August, at Kua Bay. Even then, it’s small – around 2ft from the west. The swell period is a modest 11 seconds, so it’s not a groundswell, but it’s a start. The wind goes glassy in the afternoon, which is a major positive. The water temperature is sitting at 80°, which is pretty much normal for this time of year, so no surprises there.
Sunday morning, the 2nd of August, offers something similar. The swell is a touch smaller at around 2ft from the west, but the period stretches to 12 seconds, giving it a bit more shape. The wind is glassy again in the early session, which means clean conditions. The combined energy of all swells directed here is still weak (96), so don’t expect barrels, but it’s surfable. This is likely the best on offer in the whole window.
Kua Bay is a fairly consistent spot, so it tends to pick up whatever is around. The optimum swell direction is WNW, so that west swell we’re seeing is a reasonable match. Crowds are possible here, so you might have to share the water, but on a small day like this, it’ll be more spread out. For beginners, this size is fine, but it’s not a wave to write home about.
Heading into the second week, the swell drops off again. The 3rd and 4th of August see the swell shrinking back to around 2ft and then 1ft, with the period dropping to 12 seconds and the energy fading. The wind turns cross or cross-on, and the conditions get a bit junkier. It’s not worth a special trip.
So, the standout is really the Sunday morning session on the 2nd of August. It’s not a big swell, but with glassy conditions and a clean surface, it’s your best bet in a quiet period. Everything else is flat or too weak to bother with.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Tue afternoon. Warm (max 27°C on Tue morning, min 25°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Fri morning, min 25°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | |||||||||||||||
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) | W 11 | NE 7 | SSW 26 | SSW 24 | SSW 23 | SSW 22 | SSW 20 | SSW 20 | NE 7 | NNE 7 | NNE 6 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | SW 9 | NNE 8 | E 14 |
Wave Graph | |||||||||||||||||||||
9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 12 | 0 | 0 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | cross-on | glassy | glassy | cross | glassy | glassy | cross-on | glassy | cross | cross | on | glassy | on | cross-off | cross | cross-on | cross | glassy |
High Tide | 10:31AM0.59m | 8:18PM0.40m | 11:39AM0.63m | 9:15PM0.33m | 12:37PM0.67m | 11:22PM0.29m | 1:25PM0.71m | 00:50AM0.29m | 2:06PM0.75m | 1:45AM0.30m | 2:43PM0.78m | 2:27AM0.32m | 3:16PM0.81m | 3:05AM0.34m | |||||||
Low Tide | 5:16PM0.38m | 3:30AM0.14m | 7:54PM0.33m | 4:20AM0.14m | 8:43PM0.28m | 5:20AM0.14m | 9:10PM0.23m | 6:17AM0.12m | 9:35PM0.20m | 7:07AM0.10m | 9:59PM0.18m | 7:51AM0.07m | 10:24PM0.16m | ||||||||
5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | |
— | 7:05 | — | — | 7:04 | — | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | |
mm | — | 1 | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 26 | 27 | 26 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 26 | 26 | 25 |
Feels °C | 31 | 28 | 29 | 30 | 29 | 29 | 30 | 30 | 30 | 29 | 29 | 28 | 30 | 30 | 27 | 27 | 28 | 29 | 28 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | NNE 7 | NE 7 | NE 7 | NNE 5 | NE 6 | NNE 5 | NE 6 | NE 6 | NE 7 | NNE 7 | NNE 6 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | SSW 16 | NNE 8 | ENE 15 | NNE 8 | NNE 8 |
31 | 37 | 47 | 16 | 44 | 17 | 47 | 62 | 52 | 61 | 65 | 101 | 98 | 126 | 100 | 126 | 50 | 98 | 71 | 91 | 71 | |
Swell 2 Height (m) Direction Period (s) | W 11 | SSW 12 | SSW 12 | NE 7 | SSW 23 | SSW 22 | SSW 20 | SSW 20 | SSW 18 | SSW 18 | SSW 17 | SSW 20 | SSW 16 | SSW 18 | SSW 18 | SSW 16 | E 16 | SSW 16 | SSW 15 | ENE 14 | E 14 |
9 | 14 | 13 | 12 | 106 | 91 | 78 | 75 | 66 | 61 | 59 | 76 | 51 | 102 | 60 | 86 | 19 | 48 | 42 | 70 | 94 | |
Swell 3 Height (m) Direction Period (s) | SSW 11 | SSW 16 | SSW 26 | SSW 24 | SSW 18 | ENE 12 | SSW 16 | SSW 16 | SSW 17 | S 13 | ENE 7 | SSW 16 | SSW 20 | S 11 | SSW 11 | E 16 | SSW 10 | E 15 | SW 9 | SSW 14 | SSW 14 |
12 | 26 | 65 | 55 | 30 | 13 | 25 | 25 | 30 | 13 | 5 | 25 | 37 | 2 | 12 | 20 | 10 | 42 | 12 | 41 | 41 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NNE 8 | — | NNE 8 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 126 | — | 93 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 97 | 100 | 14 | 100 | 100 | 4 | 100 | 101 | 100 | 100 | 100 | 4 | 14 | 100 | 4 | 100 | 4 | 4 | 100 | 100 | 4 |
Best forecast wave conditions in Big Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.










