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, 11AM (local time) - 2ft (0.6m), 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 11AM. The primary swell is predicted to be 0.6m and 13s 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 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+)11AM (Tue 18th Aug)2ft (0.6m) 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

Alright folks, Rusty here. Let’s have a look at what’s on the menu for Big Beach over the next couple of weeks.

First off, we’ve got a bit of a slow start. The water temp is sitting at 80°, which is about average for this time of year, so nothing unusual there. The coming days are looking pretty weak. For Tuesday the 18th and Wednesday the 19th, the swell is tiny, around 1ft to 2ft, coming from the S and SSW. The wind is mostly cross-off or light offshore, so the conditions are clean, but there’s just not enough push. The wave energy is weak, between 172 and 212, so it’s more of a paddle-around day than a surf session.

Thursday the 20th is a tease. It’s glassy, with a 2ft SSW groundswell at a very long 18 seconds period. The energy bumps up to 231, but it’s still small. That long period will make it peel a bit better at Big Beach, but it’s still only for the longboard or the patient.

The real standout starts to show up on the morning of Tuesday the 25th of August. We’re looking at a solid 3ft swell from the S, with a period of 12 seconds, and a gentle offshore breeze from the ENE. The combined energy jumps to 475, which is a nice moderate push. The afternoon holds similar, with a 3ft SSW swell. The wind stays offshore, and the conditions are clean. That’s the best window in the first week.

Wednesday the 26th morning keeps the good vibes going with a 4ft SW swell, period around 11 seconds, and light cross-off winds. Energy is strong at 569. The afternoon gets a bit breezy, but it’s still surfable.

After that, there’s a bit of a lull. The swell drops back to 2ft or less on the 27th and 28th, with moderate energy between 299 and 537. It’s not terrible, but it’s not the standout.

Now, for the second week, the real promise is on Tuesday the 1st of September. The morning shows a 5ft swell from the S, period of 10 seconds, and light cross-off winds. The energy is 546, solidly moderate. That’s getting into the territory where it’s a bit much for a beginner, but still fun for most. The water is clean.

The morning of Wednesday the 2nd of September is another highlight. A 2ft swell from the S, but with a very long period of 17 seconds, and an energy reading of 641. That’s a strong, clean groundswell. That long period means it’ll be better for the points and reefs, but at Big Beach it might run a bit straight. Still, with light winds, it’s the best-looking wave in the whole forecast.

To wrap it up, the best on offer is the morning of Tuesday the 25th of August, and the morning of Wednesday the 2nd of September. The 25th has the best combo of decent size, offshore wind, and clean conditions. The 2nd of September has the most energy and a very long period, but it’s a bit more of a specialist swell for the area. Crowds are possible at Big Beach, so get in early.

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:
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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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