Big Beach Surf Break

Lat Long: 20.63° N 156.45° W

Big Beach Surf Forecast and Surf Report

Issued: 1 am 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big Beach sea temperature is
26.9° C
0.3° 

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


Big Beach surf forecast from 18 Aug 2026:

  • Best quality surf: Friday 21 Aug, 2AM (local time) - 2.5ft (0.7m), 16s period, SW swell with offshore winds.
  • Most powerful swell: Friday 21 Aug, 8AM (local time) - 2.5ft (0.7m), 17s period, SW swell with 298 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 18 Aug, 5AM (local time) - 2.5ft (0.7m), 13s period with S swell.

Best Forecast Surf Conditions for Big Beach this week:

The surf forecast for Big Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 5AM. The primary swell is predicted to be 0.7m and 13s period with a secondary swell of 0.2m and 11s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Big Beach in the next 16 days are 0.7m 17s and forecast to arrive on Friday (Aug 21) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 7s period and expected on Monday (Aug 24) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Tue 18th Aug)2.5ft (0.7m) 13s
Best Surf 2AM (Fri 21st Aug)2.5ft (0.7m) 16s
Most Powerful 8AM (Fri 21st Aug)2.5ft (0.7m) 17s

Table - best surf conditions forecast for Big Beach over the next 16 days.


The Lowdown

This is Rusty, and here’s the look at Big Beach for the next couple weeks.

We’re looking at a lean period, especially for a beach that usually offers more. There’s a little clean run to start this week, then a long dry spell of borderline flat days in the middle. The second week shows a better pulse, but nothing giant.

Tuesday, August 18th kicks off with tiny surf – 2ft from the S with a 13-second period, light cross-offshore breeze. The water temp is pretty average for this time of year. Not exciting, but clean. Afternoon stays 2ft with a fresh offshore wind. Wednesday 19th is even smaller at around 2ft. The real standout for this early run is Thursday, August 20th. The morning is dead calm – glassy flat calm – with that 2ft SSW groundswell pushing in on a very long 18-second period. Those waves will be clean and lined up. Not big, but perfect conditions for small boards. The afternoon stays glassy too. Friday 21st morning is also clean with 2ft SW groundswell (16 seconds) and cross-off breeze.

Things turn south from Saturday 22nd afternoon. For a good stretch, maybe five days from that point, the swell is super weak – mostly 2ft to 2ft – with moderate cross-off or stronger winds and “poor” conditions. The combined energy drops and stays weak. The magic shows up on Thursday, August 27th. The swell gets to a consistent 3ft from the S (16 seconds) with clean offshore ENE winds all day. The energy is solid – hitting the high hundreds. It’s not big enough to scare anyone, and with those clean offshores, it’s the best chance for a fun session in the whole forecast. Crowds can happen sometimes, so early is better. Friday 28th morning is okay with 3ft and offshores.

From Saturday 29th, it’s back to small and weak. Sunday 30th morning has a 2ft S swell (12 seconds) with a gentle cross-off – decent for a quiet morning. Monday 31st the period drops to a short 9 seconds on a SW swell, which is bad energy. By Wednesday, September 2nd, we’re down to 2ft WNW with a light offshore – barely a ripple.

Best bets: Thursday 20th for the glassy conditions and long period groundswell, and Thursday 27th for the best combination of size, clean wind, and solid energy.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 27°C on Tue afternoon, min 24°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 29°C on Fri afternoon, min 25°C on Sat night). Wind will be generally light.

Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
1
1
1
1
1
1
2
2
1
2
1
0
1
0
0
1
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
S
13
0.6
S
13
0.4
SW
18
0.4
SSW
16
0.4
SW
16
0.5
SW
16
0.6
SSW
18
0.6
SSW
17
0.7
SW
16
0.6
SW
16
0.5
SW
16
0.7
SW
16
0.6
SSW
15
0.5
SW
15
0.6
SSW
15
0.6
SSW
15
0.5
SSW
16
0.5
SW
14
0.5
SSW
14
0.5
SSW
13
0.6
SSW
13
Wave Graph
Metric surfscale
Energy kJ
123
119
82
103
71
129
207
202
278
219
119
261
152
116
152
144
137
100
104
101
125
Wind (km/h)
10
ENE
20
ENE
15
NE
5
ENE
15
NE
10
NNE
0
NE
5
ENE
5
NE
10
E
15
E
10
NE
10
ENE
20
ENE
15
NE
30
ENE
25
ENE
20
ENE
25
ENE
30
ENE
20
ENE
Wind State
cross-off
cross-off
off
off
off
off
glassy
glassy
off
cross-off
cross-off
off
cross-off
cross-off
off
cross-off
off
off
cross-off
cross-off
off
High Tide
8:09AM0.40m
5:51PM0.38m
10:09AM0.39m
12:36PM0.42m
1:29PM0.46m
2:01PM0.50m
11:48PM0.23m
2:28PM0.53m
1:03AM0.27m
2:51PM0.56m
1:46AM0.30m
Low Tide
1:00PM0.23m
1:08AM0.06m
1:51AM0.07m
3:14AM0.08m
5:09AM0.07m
9:42PM0.17m
6:20AM0.05m
9:13PM0.16m
7:07AM0.02m
9:16PM0.15m
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
clear
clear
part cloud
clear
clear
part cloud
clear
clear
part cloud
clear
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:05
6:05
6:05
6:05
6:07
6:07
6:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:52
6:52
6:51
6:50
6:50
6:49
6:47
 mm
Temp °C
26
27
25
27
27
25
27
27
26
27
29
28
28
29
27
28
28
26
27
28
26
Feels °C
28
28
26
30
29
26
32
32
30
30
31
31
31
30
27
27
28
26
26
27
25
  • 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 Big Beach Surf forecast

The above surf forecast table for Big Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Big Beach can be found by selecting the local surf guide option on the grey menu. Our Big Beach 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 (Big Beach) 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 Big Beach 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.

Are you planning a vacation in Maui? If you are looking for accommodation near Big Beach, camping, hotels and condos and appartments in Maui, consider staying in Kihei which is 17 km (11 miles) away. Other places in and around Maui where you can find information about places to rent, and car hire include Wailuku which is 28 km (17 miles) away, Kahului, Lanai - Lanai and Kaunakakai - Molokai.

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