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
Thu
1PM - 5PM
14 May 2026
- N 13–16 knots. Gusts up to 25 knots.
- 12°C
- Sunny
Thu
5PM - 9PM
14 May 2026
- N 15 knots decreasing to 11 knots. Gusts up to 24 knots.
- 8 to 12°C
- NW 0.6m at 4s period
- UV Index: 0 - Low
- Sunny
Thu
9PM - 5AM
14 May 2026
- N 10 knots decreasing to 4 knots. Gusts up to 21 knots.
- 1 to 10°C
- Calm sea
- UV Index: 0 - Low
- Sunny