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
Thu
5AM - 9AM
19 March 2026
- NE 4–6 knots.
- Increasing from 3 to 10°C
- SW 0.5m at 10s period
- UV Index: 0 - Low
- Sunny
Thu
9AM - 1PM
19 March 2026
- E 6 knots increasing to SE 9 knots.
- 10 to 14°C
- SW 0.4m at 8s period
- UV Index: 2 - Low
- Sunny
Thu
1PM - 5PM
19 March 2026
- SE 6–9 knots.
- 12 to 15°C
- Calm sea
- UV Index: 2 - Low
- Sunny