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.

Installations
COORDINATES
51.61635 N, -3.93418 E
Port Information
Weather Forecast
Fri
5AM - 9AM
26 June 2026
- SE 4–10 knots veering SW 4-10 knots.
- 21 to 23°C
- Calm sea
- Sunny
Fri
9AM - 1PM
26 June 2026
- SW 8–12 knots. Gusts up to 17 knots.
- 19 to 23°C
- SW 0.2-0.6m at 5s period
- Mostly fine
Fri
1PM - 5PM
26 June 2026
- SW 10 knots. Gusts up to 17 knots.
- 19 to 22°C
- SW 0.6m at 4s period
- Partly cloudy