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
Sun
5AM - 9AM
14 June 2026
- Light and variable.
- Increasing from 9 to 14°C
- Calm sea
- UV Index: 0 - Low
- Cloudy
Sun
9AM - 1PM
14 June 2026
- Light and variable.
- 14 to 18°C
- Calm sea
- UV Index: 6 - High
- Partly cloudy
Sun
1PM - 5PM
14 June 2026
- SW 3–7 knots.
- 17 to 20°C
- Calm sea
- UV Index: 6 - High
- Cloudy