Kua Bay Surf Break

Lat Long: 19.81° N 156.01° W

Kua Bay Surf Forecast and Surf Report

Issued: 7 am 10 Aug 2026 (local time)

Forecast update in  hr  min

Today's Kua Bay sea temperature is
27.4° C
0.9° 

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 11 Aug 2026:

  • Most powerful swell: Friday 14 Aug, 5PM (local time) - 3ft (0.9m), 6s period, NNE swell with 57 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 0.9m 6s and forecast to arrive on Friday (Aug 14) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 8s period and expected on Sunday (Aug 16) at 5AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 5PM (Fri 14th Aug)3ft (0.9m) 6s

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


The Lowdown

G’day, Rusty here. Let’s be straight with you: the next couple of weeks are looking flat and pretty ordinary for Kua Bay. The swell window is just not lining up, and we’ve got a long stretch of small, weak waves ahead. We’re talking about a real dry spell, with only a couple of brief windows where it might be worth paddling out, and even then, it’s not going to be anything to write home about.

The first week is a total write-off, to be honest. From Monday the 10th through to the following Sunday the 16th, the swell is tiny, mostly under 2 feet, with periods that aren’t doing us any favours. The energy in the water is weak, with values mostly in the single digits and 20s and 30s, like 21 on Monday morning, and 8 on Tuesday. It’s basically flat. There’s a bit of a bump on Thursday morning with a short-period NNE swell at 3 feet and a period of only 5 seconds, but that’s just messy and won’t have any push. Winds are all over the place, with some cross-onshore and fresh breezes from the north on Saturday the 15th, kicking up some lumpy chop. Not surfable.

We finally see a tiny glimmer of hope on Wednesday the 19th. The afternoon session is the first time the guidance flags anything as surfable, but it’s a very modest call. We’re looking at a 1 feet WNW swell with a 12-second period, and the combined energy finally gets into the two-digit range with a reading of 88. It’s glassy with a light westerly breeze, so the surface will be clean. It’s not big, but it’s the best we’ve seen. The water temp here is 81°, which is about normal for this time of year, so it’s comfortable.

Then we get another short window late in the month. On Thursday the 20th, the swell direction swings to the southwest, and we see a longer-period groundswell at 17-18 seconds. The energy bumps up to 102 on Thursday morning, which is moderate, but the swell height is still only 1 foot. That long period will mean better-shaped waves, and it’s really a point-break sort of swell. Kua Bay is exposed, but that long period might make it break a bit too straight. Still, if you’re desperate, the Thursday morning clean conditions with a light cross-shore might be your best bet. Friday the 21st has another pulse of long-period SW swell, but it’s weak at 40 energy.

After that, it fades out again. The second week is pretty sparse. The weekend around the 23rd and 24th is back to tiny 0.7-1 foot waves with weak energy. There’s a pretty significant gap of several days with no real surf on offer from the 24th through the 25th, with the swell dropping out completely. It’s a real flat spell.

So, the honest truth is that there’s nothing here that’s a standout. The only two moments that might be worth a look are the glassy Wednesday afternoon on the 19th, and the longer-period Thursday morning on the 20th. But even those are marginal, small-wave days. If you’re a beginner, you’re fine—it’s all small. For everyone else, this is a time to check the charts again. This is what a blank run looks like for this area. Forecasts can change, but right now, it’s a waiting game.

Rusty.

Short Range Forecast

Light rain (total 8mm), mostly falling on Mon afternoon. Warm (max 28°C on Mon morning, min 25°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 27mm), heaviest during Sat night. Warm (max 28°C on Thu morning, min 25°C on Thu night). Winds increasing (calm on Thu night, strong winds from the NNE by Sat afternoon).

Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
AM
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
0
0
0
0
0
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
W
11
0.3
W
11
0.3
W
10
0.2
W
10
0.2
W
10
0.3
W
11
0.3
W
11
0.3
WNW
13
0.3
SSW
16
0.8
NNE
5
0.3
W
12
0.8
NNE
5
0.2
W
11
0.9
NNE
6
0.2
W
12
0.3
WNW
11
0.3
W
11
0.3
WNW
13
0.4
WNW
13
0.4
WNW
12
0.4
WNW
12
Wave Graph
Metric surfscale
Energy kJ
21
21
18
8
8
23
22
33
0
36
25
37
10
57
11
24
22
34
53
49
46
Wind (km/h)
10
WSW
5
W
5
ESE
5
NW
10
SSW
0
NNW
5
NNW
5
SW
5
N
5
NNW
10
N
5
NNE
10
NNW
10
N
10
NNE
35
NNE
25
NE
30
SW
40
S
30
S
5
SW
Wind State
cross-on
glassy
glassy
on
cross-off
glassy
on
glassy
glassy
cross-on
cross-on
glassy
cross-on
cross-on
cross
cross
cross
cross
cross-off
cross-off
cross
High Tide
2:42PM0.90m
2:44AM0.37m
3:22PM0.91m
3:31AM0.43m
4:00PM0.88m
4:16AM0.49m
4:34PM0.83m
5:00AM0.54m
5:06PM0.76m
5:44AM0.58m
5:36PM0.67m
6:30AM0.60m
6:02PM0.58m
Low Tide
9:48PM0.11m
8:12AM0.02m
10:18PM0.09m
9:03AM0.02m
10:47PM0.07m
9:51AM0.05m
11:15PM0.07m
10:38AM0.10m
11:41PM0.07m
11:27AM0.17m
00:06AM0.08m
12:18PM0.24m
00:32AM0.09m
clear
rain showers
rain showers
clear
part cloud
rain showers
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
thunderstorm
heavy rain
rain showers
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:01
6:01
6:03
6:03
6:03
6:03
6:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:54
6:54
6:53
6:52
6:52
6:52
6:51
 mm
3
3
2
4
23
1
Temp °C
28
27
27
28
27
27
28
28
27
28
28
26
28
28
27
28
26
26
27
28
27
Feels °C
31
30
31
31
30
30
30
30
31
30
30
29
29
30
29
26
23
29
25
27
28
  • Map Icons:
  • Break
  • 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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