About Swansea Marina
In Swansea Bay tidal streams flow anti-clockwise for 9.5 hours (Swansea HW -3.5 to +6), with at times a race off Mumbles Hd. From HW -6 to -3 the stream reverses, setting North past Mumbles Hd towards Swansea. Keep seaward of Mixon Shoal. When North of SW Inner Green Grounds (SWIGG) SCM It buoy, Q (6) + LFI 15s keep to West of dredged channel and clear of commercial ships. Yachts must motor in harbour and approach, maximum speed 4 knots.

Facilities
COORDINATES
51.61635 N, -3.93418 E
Port Information
Weather Forecast
Sat
1PM - 5PM
06 June 2026
- W 16 knots. Gusts up to 31 knots.
- Decreasing from 16 to 13°C
- Cloudy
Sat
5PM - 9PM
06 June 2026
- W 13–18 knots. Gusts up to 32 knots.
- 12 to 14°C
- SW 2.0m at 9s period
- UV Index: 0 - Low
- Cloudy
Sat
9PM - 5AM
06 June 2026
- W 9–16 knots. Gusts up to 26 knots.
- 10 to 13°C
- SW 1.3-1.9m at 8s period
- UV Index: 0 - Low
- Cloudy