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 am 04 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nanwan Beach (South Bay) sea temperature is
29.5° C
0.5° 

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 4 Aug 2026:

  • Best quality surf: Sunday 9 Aug, 8AM (local time) - 11ft (3.5m), 9s period, WSW swell with cross-offshore winds.
  • Most powerful swell: Monday 10 Aug, 8AM (local time) - 11ft (3.5m), 10s period, SW swell with 2,533 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 4 Aug, 2PM (local time) - 4.5ft (1.4m), 16s period with E 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 04) at 2PM. The primary swell is predicted to be 1.4m and 16s period with a secondary swell of 0.4m and 7s. Another secondary swell of 1.0m and 6s is also forecast. 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 Monday (Aug 10) 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 18s period and expected on Thursday (Aug 06) at 5PM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 2PM (Tue 4th Aug)4.5ft (1.4m) 16s
Best Surf 8AM (Sun 9th Aug)11ft (3.5m) 9s
Most Powerful 8AM (Mon 10th Aug)11ft (3.5m) 10s

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


The Lowdown

Alright folks, Rusty here. Let’s talk about what’s cooking at Nanwan Beach.

The next week and a half is a real mixed bag. We’ve got a cracking start, but then Mother Nature turns the dial up and things get messy. The good news is, after the storm passes, the tail end of the outlook looks solid again.

The water is sitting at a warm 85°, which is about average for the time of year, so no surprises there.

The standout is Tuesday the 4th. We’re looking at a clean, long-period groundswell from the East, coming in at 4 ft to 5 ft. The period is a very long 16 seconds, so these waves have real push and shape. The wind is a gentle cross-off breeze from the NE, keeping the faces clean. The combined energy is moderate at 904, building to 1190. This is the pick of the bunch for the whole window – great conditions for an intermediate surfer.

Wednesday the 5th is a close second. The swell builds to 6 ft from the East with a 17-second period, and the energy jumps right up to 2207. The wind switches to a light WNW cross-off. This is excellent surf, but at 6 ft, it’s pushing into the bigger end for a beach break, so it’s best for experienced surfers. It’s still going to be really good.

Then things go sideways. From Thursday the 6th right through to about Tuesday the 12th, the wind cranks up from the west and southwest, hitting 25-31 mph. The swell gets big, well over 8 ft, and the period drops to a short and choppy 6-8 seconds. This is going to be a washing machine. The surf quality is poor, and with those strong onshore winds, this setup looks way more interesting for kite surfing than paddle surfing. The combined energy is high, but it’s all wind and no shape.

The storm starts to ease on Thursday the 13th of August. The swell drops to 8 ft from the SW, and the wind backs off to 9 mph. The period stretches back to 11 seconds, and the energy is moderate at 1715. The conditions clean up into excellent surf for experienced surfers again.

Friday the 14th of August is another solid day. The swell holds at 8 ft from the SW, with a light WNW offshore breeze. The 11-second period gives it good form. This is a strong finish to the run.

After that, the swell slowly fades through the weekend and into the next week. The conditions stay clean but the energy drops off, and by Monday the 17th, the wind turns onshore again, killing the quality.

So, bottom line: get out there Tuesday the 4th and Wednesday the 5th for the best waves. The second week has a promising window on Thursday the 13th and Friday the 14th, but it’s a bit further out, so keep an eye on it.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Thu night. Warm (max 30°C on Tue morning, min 27°C on Tue night). Winds increasing (calm on Wed night, strong winds from the WNW by Thu night).

Days 4-6 Weather Summary

Light rain (total 3mm), mostly falling on Sun morning. Warm (max 30°C on Sat morning, min 29°C on Fri morning). Mainly strong winds.

Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
3
4
4
4
0
0
0
0
0
0
0
0
1
0
!
1
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)
1.3
E
16
1.5
E
16
1.6
E
18
1.9
E
17
1.9
E
17
0.6
SW
9
0.9
WSW
8
1
WSW
8
0.7
SW
9
1.1
SW
8
2.1
W
6
2.5
WSW
7
3
WSW
8
3
WSW
8
3.5
WSW
10
3.5
WSW
9
3
SW
10
3.5
SW
10
3.5
SW
10
3
SW
10
3
SW
10
Wave Graph
Metric surfscale
Energy kJ
822
1106
1561
2196
2023
49
83
116
79
162
339
631
989
1431
1899
1933
1903
2083
2474
1930
1986
Wind (km/h)
15
NE
15
NE
10
NE
5
WNW
10
NW
10
WNW
20
WNW
20
WNW
35
WNW
45
WNW
40
WNW
45
WNW
45
W
40
W
50
W
40
W
45
W
50
W
45
W
45
W
50
W
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
9:57AM0.86m
10:43PM0.86m
10:48AM0.72m
11:31PM0.93m
12:04PM0.58m
00:31AM0.99m
2:26PM0.49m
1:43AM1.07m
5:31PM0.49m
2:58AM1.15m
6:13PM0.51m
4:05AM1.24m
6:39PM0.52m
Low Tide
4:18PM0.31m
5:01AM0.38m
4:40PM0.37m
6:37AM0.37m
5:03PM0.41m
8:36AM0.31m
5:28PM0.46m
10:14AM0.20m
6:01PM0.49m
11:21AM0.09m
8:02PM0.49m
12:12PM0.02m
9:36PM0.46m
clear
clear
clear
clear
part cloud
clear
clear
clear
rain showers
clear
part cloud
part cloud
clear
clear
clear
thunderstorm
clear
thunderstorm
clear
part cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:30
5:30
5:31
5:31
5:31
5:31
5:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:35
6:34
6:34
6:32
6:32
6:31
6:30
 mm
1
1
2
3
Temp °C
30
30
28
29
29
29
29
29
28
29
29
29
30
30
30
30
30
30
30
30
30
Feels °C
32
32
31
33
33
34
31
31
31
27
27
28
28
28
29
29
28
29
29
28
27
  • 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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