Kua Bay Surf Break

Lat Long: 19.81° N 156.01° W

Kua Bay Surf Forecast and Surf Report

Issued: 1 pm 19 Aug 2026 (local time)

Forecast update in  hr  min

Today's Kua Bay sea temperature is
27.4° C
0.8° 

Kua Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Kua Bay surf forecast from 20 Aug 2026:

  • Best quality surf: Wednesday 19 Aug, 8PM (local time) - 1ft (0.3m), 16s period, SW swell with glassy winds.
  • Most powerful swell: Saturday 22 Aug, 8PM (local time) - 2ft (0.6m), 11s period, WNW swell with 93 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 19 Aug, 8PM (local time) - 1ft (0.3m), 16s period with SW swell.

Best Forecast Surf Conditions for Kua Bay this week:

The surf forecast for Kua Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 19) at 8PM. The primary swell is predicted to be 0.3m and 16s period with a secondary swell of 0.3m and 12s. Another secondary swell of 0.5m and 4s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Kua Bay in the next 16 days are 0.6m 11s and forecast to arrive on Saturday (Aug 22) at 8PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Sunday (Aug 23) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Wed 19th Aug)1ft (0.3m) 16s
Best Surf 8PM (Wed 19th Aug)1ft (0.3m) 16s
Most Powerful 8PM (Sat 22nd Aug)2ft (0.6m) 11s

Table - best surf conditions forecast for Kua Bay over the next 16 days.


The Lowdown

Alright folks, Rusty here. Let’s get real about what’s coming up. We’re looking at Kua Bay, and honestly, it’s a pretty quiet start. The water's sitting at a warm 81°, which is just a touch above average for this time of year – nothing crazy, just a nice little bonus.

The first few days are a write-off. From Wednesday afternoon the 19th through the 21st, it’s all poor surf conditions with tiny swell. We’re talking ankle-snappers at best, with a weak combined energy of only 43 (Kua Bay). You’re better off staying on the beach for that bit.

Then we get a little flicker of hope. Saturday morning the 22nd is still poor, but by Saturday afternoon, the wind goes totally glassy with a little 2ft swell from the WNW. The combined energy bumps up to 91 – still weak, but it's something. The waves are surfable but very ordinary. That glassy wind is a major positive, so if you’re desperate for a paddle, that’s your window. Sunday the 23rd follows a similar pattern: glassy mornings and afternoons, with a tiny 2ft to 1ft WNW swell, and combined energy hitting 120. It’s small, but clean.

From Monday the 24th right through to the end of the month, we hit another flat spell. The swell drops out completely, with combined energy falling to single digits or zero. It’s a real gap of about a week with nothing worth jumping in for. The wind is all over the place, mostly cross or cross-on, and the surf conditions are consistently poor.

There’s a tiny tease on Saturday the 29th of August with a 2ft NNE swell and glassy wind, but the combined energy is only 30 and the wave comment is still poor. Don't get your hopes up.

Finally, we get a bit more life on the 3rd of September. Thursday morning sees a 2ft SW swell with a 12-second period, giving a combined energy of 160. The wind is onshore (NNW at 9 mph), so it won't be perfect, but there’s some energy in the water. By Thursday afternoon, the wind swings to a cross-off (SSW 12 mph), keeping it clean, with the same 2ft SW swell. The combined energy is still decent at 155.

So, the standout? I’d have to say Thursday the 3rd of September is the best on offer. It’s not a classic, but that 2ft SW groundswell with a clean cross-off wind in the afternoon is your best bet. The crowds at Kua Bay can be an issue, so expect company. That said, the 2ft to 2ft glassy days around the 22nd and 23rd of August are your only other real options for a clean, small-wave session.

Overall, it’s a long dry spell ahead. Hang tight, and keep an eye on the forecasts.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 28°C on Wed afternoon, min 26°C on Wed night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 29°C on Mon afternoon, min 26°C on Sat night). Wind will be generally light.

Wed
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.3
WNW
12
0.3
SW
16
0.3
SW
18
0.3
SW
17
0.4
W
10
0.5
W
10
0.5
W
11
0.5
W
11
0.5
W
10
0.6
WNW
11
0.6
WNW
11
0.5
WNW
12
0.4
WNW
11
0.3
WNW
10
0.1
SW
14
0.2
WNW
12
0.2
WNW
11
0.3
SSW
12
0.8
NE
6
0.6
NE
5
Wave Graph
Metric surfscale
Energy kJ
28
41
49
47
35
52
59
57
56
91
91
78
46
19
8
13
12
0
0
0
Wind (km/h)
5
WNW
5
SSW
10
NW
5
WNW
10
SSW
10
WNW
15
SW
5
NNW
10
W
0
NNW
0
NNE
5
SSW
0
SW
5
S
10
WSW
10
WSW
0
SSW
15
WSW
10
SW
5
WSW
Wind State
glassy
glassy
on
on
cross-off
cross-on
cross
cross-on
cross-on
glassy
glassy
glassy
glassy
cross-off
cross
cross
glassy
cross-on
cross
cross-on
High Tide
10:49AM0.62m
12:03PM0.64m
11:29PM0.26m
12:58PM0.68m
00:53AM0.29m
1:40PM0.72m
1:39AM0.32m
2:15PM0.76m
2:16AM0.36m
2:46PM0.78m
2:51AM0.41m
Low Tide
2:09AM0.16m
3:15AM0.18m
8:38PM0.25m
8:45PM0.21m
5:58AM0.15m
9:01PM0.18m
6:54AM0.12m
9:20PM0.16m
7:39AM0.10m
9:39PM0.14m
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
clear
part cloud
clear
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
clear
part cloud
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:05
6:05
6:05
6:05
6:05
6:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:49
6:49
6:47
6:46
6:45
6:45
6:45
 mm
2
Temp °C
28
27
27
28
26
28
28
26
28
27
27
28
28
27
28
29
28
28
27
27
Feels °C
31
31
30
31
30
31
31
29
31
30
31
32
32
32
32
32
32
31
30
31
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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