Surf Forecasts:
Nanwan Beach (South Bay) surf forecast from 19 Sep 2026:
- Best quality surf: Saturday 26 Sep, 8PM (local time) - 7ft (2.1m), 14s period, ESE swell with glassy winds.
- Most powerful swell: Sunday 27 Sep, 8AM (local time) - 10ft (3.0m), 15s period, ESE swell with 3,921 kJ wave energy.
- Next surfable swell (1★+): Saturday 26 Sep, 5AM (local time) - 1.5ft (0.4m), 15s period with ESE 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 Saturday (Sep 26) at 5AM. The primary swell is predicted to be 0.4m and 15s 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 15s and forecast to arrive on Sunday (Sep 27) at 8AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 14s period and expected on Monday (Sep 21) at 8AM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 26th Sep) | 1.5ft (0.4m) 15s |
| Best Surf | 8PM (Sat 26th Sep) | 7ft (2.1m) 14s |
| Most Powerful | 8AM (Sun 27th Sep) | 10ft (3.0m) 15s |
Table - best surf conditions forecast for Nanwan Beach (South Bay) over the next 16 days.
Short Range ForecastLight rain (total 2mm), mostly falling on Sun night. Warm (max 28°C on Sun morning, min 26°C on Sun night). Winds increasing (light winds from the N on Sun morning, fresh winds from the NE by Tue afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 29°C on Fri afternoon, min 26°C on Wed morning). Winds decreasing (fresh winds from the NE on Wed night, light winds from the NE by Fri afternoon). | ||||||||||||||||||||
Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SE 8 | SE 8 | SE 8 | S 8 | SSW 8 | SSW 7 | SSW 6 | SSW 6 | SE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | SW 8 | ESE 16 | ESE 14 | ESE 14 | E 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 3 | 3 | 2 | 5 | 6 | 5 | 4 | 4 | 4 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 53 | 431 | 907 | 2970 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | 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 | glassy | glassy | cross-off |
High Tide | 2:05AM0.93m | 3:21AM0.98m | 5:52PM0.59m | 4:14AM1.03m | 5:51PM0.63m | 4:58AM1.07m | 6:02PM0.70m | 5:38AM1.08m | 6:19PM0.77m | 6:17AM1.07m | 6:40PM0.87m | ||||||||||
Low Tide | 10:26AM0.29m | 10:59AM0.25m | 11:23AM0.22m | 9:14PM0.53m | 11:44AM0.20m | 10:17PM0.45m | 12:05PM0.19m | 11:05PM0.36m | 12:25PM0.19m | 11:50PM0.28m | 12:45PM0.21m | 00:35AM0.21m | |||||||||
 |  |  |  | |  | | | | | | | | | | | | | | |  | |
 | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:46 | — | — |
 | — | 5:54 | — | — | 5:53 | — | — | 5:52 | — | — | 5:52 | — | — | 5:51 | — | — | 5:50 | — | — | 5:49 | — |
mm | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 28 | 27 | 28 | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 29 | 27 | 28 | 28 | 28 |
Feels °C | 32 | 32 | 29 | 30 | 30 | 26 | 28 | 27 | 24 | 28 | 27 | 26 | 28 | 27 | 27 | 30 | 32 | 30 | 33 | 33 | 33 |
Swell 1 Height (m) Direction Period (s) | ENE 17 | ENE 15 | ENE 14 | ENE 13 | ENE 14 | ENE 13 | SSW 6 | SSW 6 | SE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ENE 10 | SW 8 | ESE 16 | ESE 14 | ESE 14 | E 15 |
| kJ | 399 | 828 | 1095 | 1243 | 994 | 504 | 4 | 4 | 4 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 53 | 431 | 907 | 2970 |
Swell 2 Height (m) Direction Period (s) | ENE 11 | SE 8 | SE 8 | S 8 | SSW 8 | SSW 7 | SE 10 | SE 10 | SW 6 | E 10 | ENE 12 | S 6 | S 6 | NW 4 | E 13 | NNE 8 | ENE 10 | SSW 7 | ENE 9 | ENE 10 | — |
| kJ | 12 | 3 | 2 | 5 | 6 | 5 | 4 | 4 | 1 | 2 | 14 | 1 | 1 | 1 | 3 | 7 | 9 | 5 | 8 | 9 | — |
Swell 3 Height (m) Direction Period (s) | SE 8 | — | — | — | — | SE 10 | S 7 | S 7 | NW 6 | SW 6 | SW 7 | — | NW 5 | S 5 | S 6 | ESE 9 | ESE 9 | ENE 9 | ESE 9 | SW 6 | — |
| kJ | 3 | — | — | — | — | 4 | 1 | 1 | 1 | 1 | 2 | — | 1 | 1 | 1 | 8 | 7 | 8 | 7 | 1 | — |
Wind waves Height (m) Direction Period (s) | ENE 10 | NE 5 | NE 5 | NE 7 | NE 4 | NE 5 | NE 12 | NE 11 | NE 6 | ENE 5 | ENE 5 | ENE 5 | ENE 5 | ENE 5 | ENE 5 | ENE 4 | ENE 4 | NE 4 | ENE 4 | ENE 5 | — |
| kJ | 175 | 55 | 77 | 111 | 40 | 94 | 683 | 604 | 128 | 61 | 80 | 90 | 106 | 99 | 69 | 22 | 16 | 12 | 14 | 25 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 2 | 348 | 693 | 676 | 348 | 348 | 449 | 316 | 694 | 693 | 449 | 845 | 1253 | 316 | 1001 | 1254 | 79 | 0 | 0 | 0 |
Best forecast wave conditions in South Taiwan | |||||||||||||||||||||
Best forecast wave conditions in Taiwan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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