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 16 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 15 Aug 2026:

  • Best quality surf: Saturday 22 Aug, 2AM (local time) - 11ft (3.5m), 10s period, SSW swell with cross-shore winds.
  • Most powerful swell: Saturday 22 Aug, 2AM (local time) - 11ft (3.5m), 10s period, SSW swell with 2,654 kJ wave energy.
  • Next surfable swell (1★+): Sunday 16 Aug, 8PM (local time) - 7ft (2.1m), 8s period with SW 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 Sunday (Aug 16) at 8PM. The primary swell is predicted to be 2.1m and 8s period with a secondary swell of 0.2m and 11s. The wind is predicted to be cross-offshore 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 Saturday (Aug 22) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Tuesday (Aug 18) at 5PM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Sun 16th Aug)7ft (2.1m) 8s
Best Surf 2AM (Sat 22nd Aug)11ft (3.5m) 10s
Most Powerful 2AM (Sat 22nd Aug)11ft (3.5m) 10s

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


The Lowdown

Righto, grab a seat. This is Rusty, and I'm looking at the coming weeks for Nanwan Beach down in South Bay.

First off, the water temp here is sitting right on 85°, which is pretty standard for this time of year, nothing unusual there.

The outlook for the next 16 days is a bit of a mixed bag, but there are a couple of windows where it might just come together. The biggest issue is the wind, which is going to be a factor for most of the run. We start with a bit of swell on Sunday, the 16th, but with a 16 mph cross-shore wind and some rain, it's going to be a bit of a mess. Not a great start.

Now, the real standout for the whole period looks like Monday morning, the 17th of August. We've got a solid 6 ft swell from the SW, an 8-second period, and the wind is forecast to be glassy – dead calm. That's the kind of morning you set the alarm for. The wave energy is moderate at 534, so there's enough to push you around. The break is a beach and reef setup and it's fairly consistent, so you should get waves. Just a heads-up, the crowds are often here, so you'll have some company, but for clean conditions like that, it's worth it.

After that, the surf drops off fast. From Tuesday, the 18th, through Wednesday, the 19th, the swell gets smaller, around 3 ft to 4 ft, and while the wind is offshore, it's also quite strong. It's not going to be great. There's a long gap of days here with no real recommendations, just small, ordinary conditions.

Things try to pick up again on the weekend of the 22nd and 23rd. On Saturday morning, the 22nd, we see a bigger 10 ft SSW swell with a 10-second period, and the wind is a cross-offshore breeze. That is a powerful one – the combined energy jumps to 1565 – but that size is really only for the experienced crew. The morning looks the best with cleaner conditions, but it's still a bit lumpy.

The following week, from the 24th onwards, is a bit of a weird one. The swell direction swings around to the east with a very long 15 to 16-second period. This is groundswell, and it's pushing a lot of energy, with values like 1064 and 1967. This kind of long-period swell can be tricky at a beach and reef break like this, often closing out or breaking too straight. The wind is mostly onshore or cross-onshore during this period, which isn't ideal, but there's a chance on Wednesday afternoon, the 26th, and Thursday afternoon, the 27th, when the wind goes cross-off or light and the energy is still high. It's a bit of a gamble, but there could be some sneaky clean waves for the dedicated.

To be honest, a lot of this period looks like it could be more appealing for the kite surfers than paddle surfers, given the strong winds and lumpy conditions. There's a lot of poor surf forecasts in there. The best bet is clear: get out there early on Monday, the 17th, for the cleanest waves. The bigger swells later in the month are for the experts only, and the long-period stuff is a wild card.

Rusty.

Short Range Forecast

Heavy rain (total 35mm), heaviest during Sun afternoon. Warm (max 30°C on Tue afternoon, min 27°C on Sun afternoon). Winds increasing (calm on Mon morning, fresh winds from the NE by Tue afternoon).

Days 4-6 Weather Summary

Heavy rain (total 61mm), heaviest during Thu afternoon. Warm (max 30°C on Wed morning, min 27°C on Thu morning). Winds increasing (calm on Wed night, strong winds from the SSW by Thu night).

Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
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
2
3
2
0
1
0
0
0
0
1
0
0
0
0
0
1
!
3
2
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.2
SW
8
2.4
SW
8
2.1
SW
9
1.9
SW
8
1.7
SW
9
1.4
SW
8
1.1
SW
8
1.1
SW
8
1.1
SW
8
1
SW
9
1.1
SW
8
1.3
SSW
10
1.3
SSW
9
1.8
SW
10
1.9
SSW
10
3
SSW
10
2.5
SSW
10
3.5
SSW
10
3
SSW
10
2.5
SSW
10
2.1
SSW
10
Wave Graph
Metric surfscale
Energy kJ
666
792
671
523
429
288
176
176
184
148
166
314
264
573
683
1501
1299
2654
1561
1184
873
Wind (km/h)
25
WSW
25
W
15
W
5
SSW
15
E
15
NE
25
NE
35
NE
30
NE
20
NE
15
NNE
10
SE
25
S
30
SSW
35
SW
35
WSW
30
WSW
30
WSW
25
W
20
W
20
WSW
Wind State
cross
cross-off
cross-off
glassy
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
on
cross-on
cross-on
cross
cross
cross
cross
cross-off
cross-off
cross
High Tide
8:55AM1.03m
9:26PM0.83m
9:33AM0.87m
9:58PM0.88m
10:10AM0.71m
10:34PM0.92m
10:51AM0.58m
11:17PM0.93m
12:03PM0.47m
00:13AM0.94m
1:28AM0.95m
2:47AM0.98m
Low Tide
3:25PM0.26m
3:20AM0.31m
3:40PM0.33m
4:21AM0.35m
3:48PM0.38m
5:35AM0.39m
3:49PM0.42m
7:25AM0.40m
3:28PM0.44m
9:52AM0.36m
11:01AM0.29m
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
clear
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:33
5:35
5:35
5:35
5:35
5:35
5:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:27
6:25
6:24
6:24
6:23
6:22
6:22
 mm
13
12
4
3
1
2
1
7
18
18
5
5
7
1
8
Temp °C
28
27
28
29
29
28
29
30
29
30
30
28
28
28
28
28
28
28
29
29
28
Feels °C
30
29
32
34
32
30
31
29
28
31
32
30
31
28
27
28
28
31
31
31
31
  • 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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