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 10 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nanwan Beach (South Bay) sea temperature is
29.3° C
0.3° 

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 10 Aug 2026:

  • Best quality surf: Monday 17 Aug, 2AM (local time) - 7ft (2.1m), 9s period, SW swell with cross-offshore winds.
  • Most powerful swell: Sunday 16 Aug, 2AM (local time) - 10ft (3.0m), 9s period, SW swell with 1,247 kJ wave energy.
  • Next surfable swell (1★+): Sunday 16 Aug, 8PM (local time) - 6ft (1.9m), 9s 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 1.9m and 9s 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 9s and forecast to arrive on Sunday (Aug 16) 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 0.7m 14s period and expected on Tuesday (Aug 11) at 2AM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Sun 16th Aug)6ft (1.9m) 9s
Best Surf 2AM (Mon 17th Aug)7ft (2.1m) 9s
Most Powerful 2AM (Sun 16th Aug)10ft (3.0m) 9s

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


The Lowdown

Alright, let’s get into it.

To be honest, the next week and a half are looking pretty bleak around here. We’ve got a lot of stormy weather, cross-shore winds, and lumpy, messy surf that’s just not going to be worth your time. It’s a real flat spell, and the forecast is full of those “poor surf conditions” calls. You’re looking at a solid stretch of nothing from Monday the 10th all the way through to Saturday the 22nd. There’s a little bump of energy around the 12th and 13th, but the wind is just going to chop it all up. It’s not going to be a good time.

The one bright spot in all of this is the period around the 16th and 17th. On Sunday morning the 16th, the wind is going to ease off, and we’ve got a clean, cross-off breeze with some decent southwest swell. The water is glassing up, and that’s about as good as it’s going to get for a while. The following Monday afternoon the 17th looks even better—it’s listed as glassy, with the same solid southwest swell. That’s your window. If you can only get out once, make it then.

Now, for the real standout. You see that forecast for Sunday the 23rd? That’s the one. The swell is up to 7.5ft to 8.2ft from the SSW, with a longer 11-second period, and the wind is light and offshore from the NNE. That is a recipe for some proper, clean surf. The combined energy is massive, hitting 1588 in the morning and 1559 in the afternoon. This is the one to circle on the calendar. It’s a bit far out, so don’t book the day off work just yet, but it’s looking very promising. The waves are going to be a bit much for the beginners, but for anyone with a bit of experience, this is where it’s at.

Now, let’s talk about Nanwan Beach (South Bay). It’s a beach and reef setup, and it’s fairly consistent, but the crowds can be a factor. It’s exposed to the southeast, but the magic is when we get that SSW swell, which is right in its wheelhouse. The water temp is sitting at 84.7°, which is about average for this time of year, so it’s nice and warm.

The swell on the 23rd and 24th is going to be pushing up over 8ft, which is expert territory. On the 24th, it’s still big, but the wind looks a bit more iffy. The 23rd is your day. Get on it.

Short Range Forecast

Heavy rain (total 35mm), heaviest during Mon night. Warm (max 29°C on Mon night, min 28°C on Mon night). Mainly fresh winds.

Days 5-7 Weather Summary

Heavy rain (total 75mm), heaviest during Sat night. Warm (max 29°C on Thu night, min 28°C on Thu night). Mainly fresh winds.

Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
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
1
1
0
0
0
0
1
0
0
1
0
1
2
2
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.5
SW
9
2.5
SW
9
2.2
SW
9
2.1
SW
9
2.2
SW
9
2
SW
9
1.9
SW
9
1.9
SW
9
2.1
SW
8
1.8
SW
9
2
SSW
9
2.3
SW
8
2
SW
9
2.2
SSW
8
2.2
SW
8
3
SW
9
2.4
SW
9
2.1
SW
9
2.1
SW
9
Wave Graph
Metric surfscale
Energy kJ
1212
971
766
734
743
649
586
567
596
454
564
751
580
651
698
1247
846
657
703
Wind (km/h)
30
WSW
30
WSW
25
WSW
25
WSW
30
W
25
W
30
W
25
W
25
W
30
WSW
25
W
25
WSW
30
WSW
25
W
30
WSW
25
WSW
15
W
15
W
15
W
Wind State
cross
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-off
cross
cross
cross-off
cross
cross
cross-off
cross-off
cross-off
High Tide
5:05AM1.31m
7:05PM0.54m
5:59AM1.35m
7:32PM0.57m
6:48AM1.35m
7:59PM0.62m
7:33AM1.28m
8:26PM0.69m
8:15AM1.17m
8:55PM0.76m
8:55AM1.03m
9:26PM0.83m
Low Tide
9:36PM0.46m
12:56PM-0.02m
10:47PM0.40m
1:35PM-0.01m
11:46PM0.34m
2:10PM0.03m
00:41AM0.30m
2:39PM0.10m
1:33AM0.28m
3:05PM0.18m
2:26AM0.28m
3:25PM0.26m
3:20AM0.31m
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
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
5:33
5:33
5:33
5:33
5:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:30
6:30
6:30
6:29
6:28
6:28
6:27
 mm
11
6
5
6
1
2
3
1
6
5
7
15
8
6
23
5
3
Temp °C
29
29
29
28
29
29
29
29
29
29
29
29
28
29
29
28
29
29
28
Feels °C
30
31
30
30
30
30
32
30
30
32
30
30
29
30
30
29
32
32
32
  • 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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