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 21 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nanwan Beach (South Bay) sea temperature is
29.1° 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 21 Aug 2026:

  • Best quality surf: Thursday 27 Aug, 5PM (local time) - 6ft (1.9m), 10s period, SW swell with cross-offshore winds.
  • Most powerful swell: Tuesday 25 Aug, 11AM (local time) - 7ft (2.1m), 18s period, E swell with 2,672 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 26 Aug, 5AM (local time) - 5.5ft (1.7m), 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 Wednesday (Aug 26) at 5AM. The primary swell is predicted to be 1.7m 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 2.1m 18s and forecast to arrive on Tuesday (Aug 25) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 16s period and expected on Tuesday (Aug 25) at 8PM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Wed 26th Aug)5.5ft (1.7m) 9s
Best Surf 5PM (Thu 27th Aug)6ft (1.9m) 10s
Most Powerful11AM (Tue 25th Aug)7ft (2.1m) 18s

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 on offer for the next couple of weeks.

Honestly, folks, it's a tough stretch ahead. We've got a real battle on our hands with wind and weather. For the first week at least, it's all about dodging stormy conditions and strong, messy cross-shore winds. The water temp is sitting at a warm 84°, which is pretty much spot-on for this time of year, so that's one good thing.

The first real chance to even think about it is on the morning of Saturday the 22nd at Nanwan Beach (South Bay). We’ve got a 8 ft SW swell rolling in with a period of 10 seconds, so moderate energy (1209). The wind is a cross-offshore breeze, which should clean things up a bit. It’s not going to be perfect, but it's likely the best window in a sea of poor forecasts. The Saturday afternoon session is much the same story with 8 ft and a slightly shorter 9 second period (1147). The crowds are often here, so expect company.

The wind turns ugly again from Sunday the 23rd right through to Friday the 28th. It’s a long stretch of messy, cross-shore junk with solid but poor-quality swell. The wave energy stays moderate for most of that time, but with constant wind and risk of thunderstorms, it's a bit of a write-off for a decent paddle. If you're into kite surfing, the strong cross-shore winds and hefty 10 ft to 12 ft SW swell on the 24th might just get you stoked.

We get a tiny glimmer a week out on Tuesday the 25th. A very long-period groundswell from the east sneaks in – 18 seconds! The combined energy is strong (3271) but the swell jumps to 7 ft. The problem? It's still a fresh cross-shore breeze making a lumpy mess of it. A long-period swell like that really wants a point break to wrap around, not a beach and reef set-up getting chopped up.

After that, it's more of the same grind. There’s a small window on Wednesday the 2nd of September morning with 6 ft of SW swell and a cross-off wind, but it's just marginal. The end of the forecast period has something to keep in the back of your mind. The morning of Friday the 4th of September looks promising – light winds, almost glassy, with a clean 5 ft SW swell. The wave energy is moderate (568). It’s a long way out so treat it with caution, but it’s the first time in ages conditions genuinely look good for a proper, clean session.

For now, don't get your hopes up too high. The best bet looks like that Saturday the 22nd for a rough but rideable wave, or keep your fingers crossed that the glassy conditions on the 4th of September deliver.

- Rusty

Short Range Forecast

Heavy rain (total 159mm), heaviest during Fri night. Warm (max 27°C on Fri morning, min 26°C on Fri night). Mainly fresh winds.

Days 4-6 Weather Summary

Heavy rain (total 194mm), heaviest during Tue afternoon. Warm (max 28°C on Tue morning, min 24°C on Tue afternoon). Winds decreasing (strong winds from the WSW on Mon afternoon, calm by Wed morning).

Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
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
0
1
2
1
0
0
1
0
0
1
2
2
0
0
2
1
0
1
3
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3.5
SW
10
3.5
SW
10
3
SW
10
2.5
SW
10
2.5
SW
9
2.5
SW
9
2.5
SW
9
2.5
SW
9
2.5
SW
9
2.3
SW
9
2.5
SW
9
1.5
E
18
2.1
E
18
2.2
E
16
1.7
SW
9
1.7
SW
9
1.8
SW
10
1.5
SW
10
1.9
SSW
9
1.9
SW
10
1.7
SSW
10
Wave Graph
Metric surfscale
Energy kJ
1904
2129
1631
1195
1168
1126
1094
1175
1065
834
1010
1351
2672
2573
492
492
566
398
591
681
522
Wind (km/h)
35
WSW
35
WSW
30
WSW
25
W
25
WSW
30
WSW
35
SW
25
W
35
WSW
40
WSW
30
WSW
25
W
25
WSW
20
E
10
S
5
SSE
10
SW
15
SW
20
WSW
10
W
5
SE
Wind State
cross
cross
cross
cross-off
cross
cross
cross
cross-off
cross
cross
cross
cross-off
cross
cross-on
on
glassy
cross
cross
cross-off
cross-off
glassy
High Tide
1:28AM0.95m
2:47AM0.98m
3:51AM1.03m
6:41PM0.54m
4:42AM1.09m
6:38PM0.56m
5:24AM1.14m
6:49PM0.59m
6:02AM1.17m
7:06PM0.64m
Low Tide
9:52AM0.36m
11:01AM0.29m
11:37AM0.24m
12:05PM0.19m
9:07PM0.52m
12:31PM0.16m
10:17PM0.46m
12:55PM0.14m
11:07PM0.40m
1:18PM0.14m
11:51PM0.35m
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
heavy rain
light rain
light rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:35
5:35
5:37
5:37
5:37
5:37
5:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:22
6:22
6:21
6:21
6:20
6:19
6:17
 mm
14
21
42
11
6
13
14
20
18
22
18
36
14
52
34
5
4
9
9
4
5
Temp °C
27
27
27
27
27
27
27
27
27
27
27
27
28
27
27
25
28
28
28
28
28
Feels °C
26
26
27
29
28
29
28
27
29
27
25
26
30
30
30
30
32
31
32
31
34
  • 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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