Nanwan Beach (South Bay) Surf Break

Lat Long: 21.96° N 120.76° E

Nanwan Beach (South Bay) Surf Forecast and Surf Report

Issued: 7 pm 17 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: Sunday 23 Aug, 5PM (local time) - 8ft (2.5m), 9s period, SW swell with offshore winds.
  • Most powerful swell: Saturday 22 Aug, 5AM (local time) - 10ft (3.0m), 10s period, SSW swell with 1,996 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 18 Aug, 5AM (local time) - 4.5ft (1.4m), 8s 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 Tuesday (Aug 18) at 5AM. The primary swell is predicted to be 1.4m 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 3.0m 10s and forecast to arrive on Saturday (Aug 22) at 5AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Tuesday (Aug 18) at 2PM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Tue 18th Aug)4.5ft (1.4m) 8s
Best Surf 5PM (Sun 23rd Aug)8ft (2.5m) 9s
Most Powerful 5AM (Sat 22nd Aug)10ft (3.0m) 10s

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


The Lowdown

Alright, Rusty here. Let's have a look at what's cookin' in our little corner.

Alright, let's be straight with each other. The next couple of weeks ain't shaping up to be a classic by any stretch. We've got a big ol' blank patch at the start before we even see a wave worth paddling for. There's nothing decent on offer until late in the first week, and even then, it's mostly a bit of a messy affair. The one true standout, the one you want to circle on your calendar, is way down the line on the 27th of August.

The first real chance of a surf comes Monday the 17th of August at Nanwan Beach (South Bay). The water’s sitting at a warm 85°, pretty much bang on average for the time of year. That afternoon, you’ve got a small 6ft swell rolling in from the SSW with a short, weak 8-second period. The combined swell energy is moderate at 376. But here's the thing – the wind is dead glassy out of the south at just 3 mph. That makes for a pretty, clean surface. It’s an intermediate wave, and the crowds are often around, so you’ll have company. But if you’re just keen to get wet, this is your window.

After that little tease, things go downhill fast. From Tuesday the 18th right through to the 26th of August, it’s a write-off. The wind goes onshore or cross-shore, a proper breeze that chops it all up, and the storms roll in. There’s a bit of size in there – we see some 10ft days from the 20th to the 22nd – but with those howling cross-onshore winds, it’s just a washing machine. The combined swell energy gets up into the strong range (over 1600), but with that wind, it’s basically a kiteboarding session, not a surf. Beginners, stay well away when it’s over 5ft, and over 8ft it's for experts only, but the conditions are so poor it doesn't matter.

Now, here’s where it gets interesting. Thursday the 27th of August is our standout. We get a pulse of groundswell from the east, a proper 5ft at a long 16-second period. That’s a very long period, which means better shaped waves and more energy, but at a beach break like this, it can make 'em a bit straight. The combined swell energy hits the strong zone at 1511. But the wind is clean, a cross-offshore breeze from the west at 12 mph. It’s a marginal forecast, but it’s the best we’ve got by a long shot. Early morning on the 28th of August is also worth a look, with a similar 5ft, 16-second east swell and clean cross-offshore wind (1547 energy). Those two slots are your best bet, but remember, we’re talking over a week away, so the finer details are still up in the air.

So, to sum it up: one clean afternoon on the 17th for a fun little wave, a long, ugly dry spell, then a potential quality window around the 27th and 28th of August if the long-range promise holds up. This area can turn quickly, so don't write the whole two weeks off.

- Rusty

Short Range Forecast

Heavy rain (total 47mm), heaviest during Wed night. Warm (max 30°C on Tue morning, min 27°C on Wed night). Winds decreasing (fresh winds from the ENE on Tue afternoon, light winds from the S by Wed night).

Days 5-7 Weather Summary

Heavy rain (total 59mm), heaviest during Sat morning. Warm (max 29°C on Sat afternoon, min 28°C on Thu night). Winds decreasing (fresh winds from the SW on Thu night, light winds from the NNW by Sun afternoon).

Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
0
0
0
2
0
1
0
1
1
1
1
2
2
1
3
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
SW
8
1.2
SW
8
1.3
SSW
8
1.4
SSW
9
1.2
SSW
9
1.1
SW
8
2.2
SSW
9
2.2
SSW
9
3
SSW
10
3
SSW
10
3
SW
9
3
SW
10
3
SSW
10
3
SW
10
3
SW
10
2.5
SW
10
2.5
SW
9
2.5
SW
9
2.4
SW
10
Wave Graph
Metric surfscale
Energy kJ
281
192
202
286
197
162
816
770
1495
1447
1351
1770
1854
1792
1696
1446
1255
1089
1037
Wind (km/h)
15
NE
30
ENE
30
ENE
30
ENE
15
E
15
SSE
20
SW
30
SW
30
SW
35
SW
30
WSW
30
WSW
35
WSW
30
WSW
30
W
25
W
25
WNW
10
NNW
5
NW
Wind State
cross-off
cross
cross
cross
cross
on
cross
cross
cross
cross-on
cross
cross
cross
cross
cross-off
cross-off
cross-off
off
off
High Tide
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
3:51AM1.03m
Low Tide
4:21AM0.35m
3:48PM0.38m
5:35AM0.39m
3:49PM0.42m
7:25AM0.40m
3:28PM0.44m
9:52AM0.36m
11:01AM0.29m
11:37AM0.24m
thunderstorm
thunderstorm
thunderstorm
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
<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
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:25
6:24
6:24
6:23
6:22
6:22
6:21
 mm
1
2
2
2
19
13
8
14
7
6
13
8
5
3
3
7
Temp °C
29
30
29
28
29
30
28
28
28
28
28
28
28
28
29
28
29
29
28
Feels °C
32
30
29
28
31
33
31
29
28
29
28
29
29
28
29
30
30
31
32
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Nanwan Beach (South Bay):

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Nanwan Beach (South Bay) surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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.

Nearest locationNearest