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
Sun
5AM - 9AM
05 July 2026
- NW 3–7 knots.
- 13 to 17°C
- W 0.4m at 5s period
- UV Index: 0 - Low
- Cloudy
Sun
9AM - 1PM
05 July 2026
- W 6 knots increasing to 9 knots.
- Increasing from 17 to 20°C
- Calm sea
- UV Index: 7 - High
- Cloudy
Sun
1PM - 5PM
05 July 2026
- W 8–10 knots.
- 18 to 21°C
- SW 0.5m at 4s period
- UV Index: 7 - High
- Cloudy