Big Beach Surf Break

Lat Long: 20.63° N 156.45° W

Big Beach Surf Forecast and Surf Report

Issued: 7 am 21 Aug 2026 (local time)

Forecast update in  hr  min

Today's Big Beach sea temperature is
27.0° C
0.4° 

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 21 Aug 2026:

  • Best quality surf: Wednesday 26 Aug, 8PM (local time) - 2.5ft (0.7m), 19s period, S swell with offshore winds.
  • Most powerful swell: Thursday 27 Aug, 11PM (local time) - 3.5ft (1.1m), 16s period, S swell with 582 kJ wave energy.
  • Next surfable swell (1★+): Friday 21 Aug, 5PM (local time) - 1.5ft (0.5m), 16s period with SW 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 Friday (Aug 21) at 5PM. The primary swell is predicted to be 0.5m and 16s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Big Beach in the next 16 days are 1.1m 16s and forecast to arrive on Thursday (Aug 27) at 11PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 6s period and expected on Saturday (Aug 22) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Fri 21st Aug)1.5ft (0.5m) 16s
Best Surf 8PM (Wed 26th Aug)2.5ft (0.7m) 19s
Most Powerful11PM (Thu 27th Aug)3.5ft (1.1m) 16s

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


The Lowdown

G’day, Rusty here. We’ve got a 16-day window for Big Beach, but I gotta be straight with you – don’t get your hopes up too high. This isn’t a week for heroics. The swell hangs around the 2 ft to 3 ft mark most of the time, with some decent long-period groundswell in the mix, but it’s not gonna set the world on fire. The water’s sitting at a warm 81°F, pretty much bang on average for this time of year.

The whole run looks pretty ordinary for a while. From Friday the 21st right through to Tuesday the 25th, it’s mostly cross-off or offshore winds, which is nice for clean faces, but the waves are small – 2 ft to 2 ft – and the energy is weak to moderate (174 to 296 in the combined energy). It’s surfable, but you’ll be fighting for tiny shoulders. There’s a couple of marginal tides in there, so it’s not gonna light your fire.

Now, things start to perk up a little on Wednesday the 26th. The swell picks up to 2 ft from the SSW, with a period of 14 to 17 seconds, which is proper groundswell. The combined energy jumps to moderate 454 to 551, and with gentle to moderate offshore winds from the NE and ENE, the surface will be clean. It’s still small, but for the patient surfer, there’ll be some fun peelers. Thursday the 27th morning is the real standout of this forecast. You’ve got 3 ft of SSW groundswell with a 16-second period, and the combined energy hits 836 – that’s moderate to strong. The wind is a gentle offshore from the ENE, so expect glassy, clean conditions. This is the best on offer, hands down. After that, it drops back to ordinary 2 ft to 2 ft stuff through to the end of the month.

Then, we get into September, and there’s a bit of a tease. On Tuesday the 1st of September, the swell hangs around 3 ft from the S and SSW, with a long 18-second period, and the combined energy is strong at 533. But the wind is a fresh 19 mph offshore from the NE – that’s a strong breeze. It’ll be clean, but it’s gonna be bumpy for paddling, and with that long period, it might break a bit straight on the beach. It’s more for the experienced crew. Wednesday the 2nd of September is a better bet: 3 ft SSW groundswell, 15 to 16-second period, and gentle cross-off winds. The energy is moderate (347 to 392), and the surface will be clean. It’s small, but consistent. After that, it fades to more ordinary 1 ft to 2 ft dribble through to the end of the window.

Look, if you’re after the best window, Thursday the 27th of August morning is the pick. For bigger, more challenging conditions, Tuesday the 1st of September has the energy but needs a surfer who can handle a breeze. There’s a big gap of ordinary surf between these two highlights, so don’t expect a constant run of good ones.

Stay salty,
Rusty

Short Range Forecast

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

Days 4-6 Weather Summary

Mostly dry. Warm (max 28°C on Mon morning, min 25°C on Tue night). Wind will be generally light.

Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
1
2
0
0
1
0
0
1
1
0
1
1
1
2
2
2
2
3
2
2
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
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
0.7
SSW
14
0.6
SSW
13
0.6
SSW
13
0.5
SSW
16
0.5
SSW
16
0.5
S
18
0.7
SSW
14
0.7
S
17
0.7
S
18
0.8
S
18
0.8
S
16
1.1
S
16
Wave Graph
Metric surfscale
Energy kJ
219
119
261
152
116
152
144
137
100
163
139
127
146
140
165
215
290
318
441
325
575
Wind (km/h)
5
ENE
15
E
15
ENE
15
E
15
ENE
20
ENE
20
ENE
25
E
15
NE
15
E
25
E
15
ENE
15
E
25
E
20
NE
10
ENE
20
NE
15
NE
15
E
20
ENE
20
NE
Wind State
glassy
cross-off
off
cross-off
cross-off
off
cross-off
cross-off
off
cross-off
cross-off
off
cross-off
cross-off
off
off
off
off
cross-off
off
off
High Tide
1:29PM0.46m
2:01PM0.50m
11:48PM0.23m
2:28PM0.53m
1:03AM0.27m
2:51PM0.56m
1:46AM0.30m
3:14PM0.58m
2:23AM0.34m
3:36PM0.59m
2:59AM0.38m
3:58PM0.59m
3:35AM0.41m
Low Tide
5:09AM0.07m
9:42PM0.17m
6:20AM0.05m
9:13PM0.16m
7:07AM0.02m
9:16PM0.15m
7:45AM0.01m
9:28PM0.13m
8:19AM-0.01m
9:45PM0.11m
8:51AM-0.01m
10:04PM0.09m
clear
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clear
clear
part cloud
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part cloud
clear
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
rain showers
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<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:05
6:07
6:07
6:07
6:07
6:07
6:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:50
6:50
6:49
6:47
6:46
6:45
6:45
 mm
1
Temp °C
28
28
28
28
29
27
28
29
27
28
28
27
28
28
26
27
27
25
26
26
25
Feels °C
32
32
30
29
30
27
29
27
27
30
28
29
29
28
26
27
26
25
27
27
25
  • Map Icons:
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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 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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