About River Island Marina
38.91186° N, 90.49404° W Boat/Rv services St. Charles, MO The River Island Marina offers a family friendly environment in an open and natural setting with covered slips that look across the channel into our private, wooded island. We have excellent boat launch ramps, plenty of parking, 24-hour restroom access, and a great environment.
Facilities
Electricity
Water
ToiletsCOORDINATES
38.91205 N, -90.49376 E
Port Information
Telephone
Berth Sizes
< 10m
Depth at MLW
2 - 3m
Manoeuvrability
Fair
Channel Marking
Fair
Port of Entry
No
Overseas Visitor Berths
No
Dock Type
Floating
Style Side To
Yes
Tidal Flow
Negligible
Active Winter
Yes
Weather Forecast
Thu
5AM - 9AM
09 April 2026
SW 6–9 knots. Gusts up to 25 knots.
10 to 16°C
UV Index: 0 - Low
Partly cloudy
Thu
9AM - 1PM
09 April 2026
- SW 8 knots increasing to 11 knots. Gusts up to 19 knots.
- Increasing from 13 to 21°C
- UV Index: 6 - High
- Partly cloudy
Thu
1PM - 5PM
09 April 2026
- SW 11 knots decreasing to 9 knots. Gusts up to 17 knots.
- 23 to 26°C
- UV Index: 6 - High
- Partly cloudy