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 25 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nanwan Beach (South Bay) sea temperature is
28.9°C
0.0° 

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 25 Aug 2026:

  • Best quality surf: Friday 28 Aug, 11PM (local time) - 5.5ft (1.7m), 9s period, SW swell with cross-offshore winds.
  • Most powerful swell: Tuesday 25 Aug, 5PM (local time) - 8ft (2.4m), 17s period, E swell with 3,355 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 25 Aug, 8PM (local time) - 6.5ft (2.0m), 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 Tuesday (Aug 25) at 8PM. The primary swell is predicted to be 2.0m and 8s period. 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 2.4m 17s and forecast to arrive on Tuesday (Aug 25) at 5PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 17s period and expected on Tuesday (Aug 25) at 8PM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Tue 25th Aug)6.5ft (2.0m) 8s
Best Surf11PM (Fri 28th Aug)5.5ft (1.7m) 9s
Most Powerful 5PM (Tue 25th Aug)8ft (2.4m) 17s

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


The Lowdown

Alright, let’s get into it. This is Rusty, checking in from the South Bay region.

Right off the bat, the next few days are messy. We've got a big, powerful groundswell rolling in, but the wind and weather are all over the place, which is really putting a lid on quality. The first real chance to get out is Tuesday the 25th, but honestly, it's not great. Tuesday morning has a strong 7ft east swell with a very long 18-second period, packing some serious energy (3419), but a cross-shore wind and rain make it a bit of a battle. Tuesday afternoon cleans up a bit with a cross-offshore breeze and a slightly bigger 8ft east swell, but there's still a risk of thunderstorms hanging around.

Wednesday the 26th and Thursday the 27th see the swell shift to the southwest and drop in period to a short 8-9 seconds. The energy drops right off (around 660-770), which means the waves will be weaker and more disorganised. Plus, the wind howls at 22-25 mph. It's not great for paddling. Honestly, with that much wind and a beach-reef setup, this might look more interesting for kiteboarding than paddle surfing.

Friday the 28th stays in that same rough, choppy groove. The weekend offers a glimmer of hope. By Sunday the 30th, the wind settles and we see a cleaner 6ft southwest swell with a 10-second period. The wave energy is still moderate (627), but the morning has a gentle offshore breeze, so there should be some clean, fun lines—a decent option for an intermediate surfer. Be mindful, though, Nanwan Beach can get busy, so expect some company.

Now, for the standout. Look ahead to Wednesday the 2nd of September. The morning is a write-off, but the afternoon turns on. We get a really fun 4ft east swell, but the period jumps to a very long 12 seconds, and the energy is a solid 716. The wind goes light cross-offshore. This combo is going to produce some clean, well-shaped waves. It’s not huge, but the quality will be there. This is the best bet of the whole outlook.

Then, just when you think it's all over, we get a beautiful run from the 4th to the 5th of September. A 3ft to 4ft west-southwest groundswell, mostly 10-second period, with glassy conditions and calm winds. This is a proper dawn-patrol set-up—clean, tiny, but absolutely perfect for logging or a longboard. For the experienced surfer, Monday the 7th of September morning sees a sudden jump back to a 7ft southwest swell, with glassy wind again. That one might be a bit too much for beginners, but for anyone with some experience, it’s a serious contender with punchy waves.

The water temp sits at a balmy 84°, which is bang on average for this time of year, so you can stay out in a shorty or just boardshorts.

All in all, this forecast has a rough start, a good middle section, and a very promising long-range finish. The long-range stuff looks great, but as always, keep an eye on the forecasts as we get closer.

- Rusty

Short Range Forecast

Heavy rain (total 50mm), heaviest during Tue morning. Warm (max 28°C on Tue night, min 27°C on Tue morning). Winds increasing (calm on Tue night, strong winds from the W by Thu night).

Days 4-6 Weather Summary

Heavy rain (total 31mm), heaviest during Sun night. Warm (max 29°C on Fri afternoon, min 26°C on Sun night). Winds increasing (calm on Sat morning, fresh winds from the NE by Sun night).

Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
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
3
1
0
1
0
1
0
0
0
1
3
2
1
3
2
2
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
E
18
2.4
E
17
1.9
SW
9
2.1
SW
9
2.1
SW
9
1.9
SW
9
2.1
SW
9
2.3
SW
8
2.2
SW
8
2.1
SW
8
2.1
SW
8
1.6
SW
9
2.1
SSW
9
2.2
SW
10
1.9
SW
10
1.8
SW
10
1.6
SW
10
1.5
SW
10
1.4
SW
10
1.3
SW
10
1.2
SW
10
Wave Graph
Metric surfscale
Energy kJ
2703
3355
548
655
668
554
668
760
687
593
602
427
707
881
681
625
471
424
341
309
269
Wind (km/h)
20
WSW
20
WNW
10
SW
25
W
25
W
30
W
35
WNW
40
W
40
W
30
W
25
W
10
W
10
E
30
NE
10
NNW
15
NW
5
NNE
35
ENE
40
NE
35
NE
25
NE
Wind State
cross
cross-off
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-on
cross-off
off
off
cross-off
cross
cross-off
cross-off
cross-off
High Tide
6:38PM0.56m
5:24AM1.14m
6:49PM0.59m
6:02AM1.17m
7:06PM0.64m
6:38AM1.18m
7:26PM0.70m
7:13AM1.14m
7:49PM0.76m
7:48AM1.08m
8:14PM0.84m
8:25AM0.98m
8:42PM0.91m
Low Tide
12:31PM0.16m
10:17PM0.46m
12:55PM0.14m
11:07PM0.40m
1:18PM0.14m
11:51PM0.35m
1:39PM0.15m
00:35AM0.30m
2:00PM0.18m
1:18AM0.26m
2:19PM0.22m
2:05AM0.24m
2:38PM0.27m
2:55AM0.24m
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
thunderstorm
clear
thunderstorm
light rain
rain showers
rain showers
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:37
5:37
5:37
5:37
5:39
5:39
5:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:20
6:19
6:17
6:16
6:15
6:15
6:14
 mm
15
4
5
9
5
4
1
2
5
4
2
3
1
2
1
18
1
Temp °C
27
27
28
28
28
28
28
28
28
28
29
28
29
29
28
28
28
27
29
29
28
Feels °C
28
29
32
30
30
30
28
27
27
28
30
32
33
29
27
31
32
30
27
28
26
  • 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 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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