Nanwan Beach (South Bay) Surf Break

Lat Long: 21.96° N 120.76° E

Nanwan Beach (South Bay) Surf Forecast and Surf Report

Issued: 1 am 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nanwan Beach (South Bay) sea temperature is
29.2° C
0.2° 

Nanwan Beach (South Bay) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Nanwan Beach (South Bay) surf forecast from 17 Aug 2026:

  • Best quality surf: Friday 21 Aug, 2AM (local time) - 11ft (3.5m), 10s period, SSW swell with cross-shore winds.
  • Most powerful swell: Friday 21 Aug, 11PM (local time) - 11ft (3.5m), 10s period, SW swell with 2,736 kJ wave energy.
  • Next surfable swell (1★+): Friday 21 Aug, 2AM (local time) - 11ft (3.5m), 10s period with SSW swell.

Best Forecast Surf Conditions for Nanwan Beach (South Bay) this week:

The surf forecast for Nanwan Beach (South Bay) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 2AM. The primary swell is predicted to be 3.5m and 10s period. The wind is predicted to be cross-shore as the swell arrives.

The most powerful waves expected at Nanwan Beach (South Bay) in the next 16 days are 3.5m 10s and forecast to arrive on Friday (Aug 21) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Wednesday (Aug 19) at 5AM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Fri 21st Aug)11ft (3.5m) 10s
Best Surf 2AM (Fri 21st Aug)11ft (3.5m) 10s
Most Powerful11PM (Fri 21st Aug)11ft (3.5m) 10s

Table - best surf conditions forecast for Nanwan Beach (South Bay) over the next 16 days.


The Lowdown

G'day, Rusty here. Let's have a proper look at what's on the cards for Nanwan Beach (South Bay) over the next couple weeks.

Right off the bat, things look pretty grim on the south coast. The first several days offer nothing rideable – we're looking at a run of basically no surf from now until the end of the week. Strong cross-shore winds and lumpy conditions are mashing up the small, short-period SW swell, and the scores reflect it: absolute zero for Tuesday and Wednesday, and even Thursday’s bigger 8ft SSW swell (1035 combined energy) just gets ruined by mod rain and fresh cross-onshore wind. Not a single wave worth paddling for.

Friday 21 August is where it gets interesting, but with a big caveat. The swell jumps up to 12ft SSW (2239 combined energy) and the winds go cross-shore with the tide favourable. Problem is, that's way too much wave for this beach-and-reef setup – we're talking expert territory only, and even then it's gonna be a washing machine. Saturday 22 August sees similar size, up to 12ft SW (2576 combined energy) with a longer 11-second period and clean cross-offshore winds from the west on the afternoon. That's promising for the brave crew, but again, this is big, powerful stuff. For the average surfer, it's a day to watch from the sand.

Now here's the real standout. Sunday 23 August – mark it down. The swell drops to a much friendlier 7ft SSW (755 combined energy) with a 9-second period, and the wind goes offshore from the northwest at just 3 mph on the afternoon. Glassy, clean, with proper shape. That's your best bet in the whole window. Water temp's sitting at 85°, which is pretty average for the time of year – no anomaly to speak of. Keep in mind this spot can get crowded, and it's fairly consistent, so you won't be alone.

Monday 24 August and Tuesday 25 August get messy again with strong onshore winds and a weird mix of swell directions. Wednesday 26 August offers another clean morning with a 8ft E swell (3542 combined energy) and a very long 16-second period. That's a groundswell with proper energy, but beach breaks might turn it into a closeout. Nanwan Beach is a beach and reef setup, so points and reefs will handle it better. It's a good option for experienced surfers, but the long period could make it tricky.

After that, from Thursday 27 August right through to the end of the forecast on 2 September, it's pretty flat or blown out. Winds turn onshore again with consistent cross and cross-on conditions, and the swell stays below 7ft with short periods. The odd glimmer on the 2nd September morning shows a 6ft SW swell (619 combined energy) with light winds, but it's marginal at best.

So, to sum it up: the first few days are a write-off. Your one true standout is Sunday 23 August afternoon – clean, offshore, manageable swell. The big stuff on Friday and Saturday is for experts only. Wednesday 26 August is a decent backup if you've got the experience for the long-period E swell. After that, it's back to the waiting game.

Rusty.

Short Range Forecast

Heavy rain (total 82mm), heaviest during Wed night. Warm (max 30°C on Wed afternoon, min 27°C on Wed night). Mainly fresh winds.

Days 4-6 Weather Summary

Heavy rain (total 55mm), heaviest during Fri morning. Warm (max 29°C on Sun morning, min 27°C on Sun night). Winds decreasing (fresh winds from the SW on Fri afternoon, calm by Sun night).

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)
0
0
0
0
0
0
0
0
!
!
!
!
1
!
3
2
3
3
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)
1.1
SW
8
1.3
SSW
8
1.4
SSW
9
1.3
SSW
8
1.2
SSW
8
1.9
SSW
10
2.5
SSW
9
2.5
SSW
10
3.5
SSW
10
3.5
SSW
10
3.5
SSW
10
3.5
SSW
10
3
SSW
9
3.5
SW
11
3
SW
10
2.4
SSW
10
2.1
SSW
9
2
SSW
9
1.6
SW
9
0.8
E
20
1.6
E
18
Wave Graph
Metric surfscale
Energy kJ
154
202
280
222
188
697
1021
1111
2044
2239
2473
2292
1523
2556
1535
995
739
666
418
512
1615
Wind (km/h)
35
ENE
30
ENE
30
ENE
20
ENE
20
SE
15
SW
30
SW
25
WSW
35
SW
30
SW
35
WSW
35
SW
30
WSW
25
W
20
W
20
WNW
5
NW
0
N
40
NE
40
ENE
25
ENE
Wind State
cross
cross
cross
cross
on
cross-on
cross-on
cross
cross
cross
cross
cross
cross
cross-off
cross-off
cross-off
off
glassy
cross-off
cross
cross
High Tide
10:10AM0.71m
10:34PM0.92m
10:51AM0.58m
11:17PM0.93m
12:03PM0.47m
00:13AM0.94m
1:28AM0.95m
2:47AM0.98m
3:51AM1.03m
6:41PM0.54m
4:42AM1.09m
Low Tide
3:48PM0.38m
5:35AM0.39m
3:49PM0.42m
7:25AM0.40m
3:28PM0.44m
9:52AM0.36m
11:01AM0.29m
11:37AM0.24m
12:05PM0.19m
9:07PM0.52m
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thunderstorm
thunderstorm
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rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
rain showers
thunderstorm
thunderstorm
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<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:35
5:35
5:35
5:35
5:35
5:37
5:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:24
6:24
6:23
6:22
6:22
6:21
6:21
 mm
2
2
2
1
24
20
16
15
11
7
15
7
5
4
1
2
3
1
1
2
Temp °C
29
29
28
29
30
28
28
27
28
28
28
28
28
28
28
29
29
28
29
29
28
Feels °C
30
29
28
30
32
31
29
27
29
28
28
29
29
29
31
32
32
33
28
27
28
  • 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 Nanwan Beach (South Bay) Surf forecast

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

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