About John's Boat Harbor
Located at 2407 Hwy C, St Charles, MO 63301, United States Member only Marina on the Mississppi River Upper Mississippi River Mile Marker 231.8
Facilities
Electricity
Petrol
Water
Showers
Toilets
BoatbuilderCOORDINATES
38.87821 N, -90.62325 E
Port Information
Telephone
Berth Sizes
< 10m, 10-20m
Depth at MLW
< 2m
Manoeuvrability
Fair
Channel Marking
Fair
Port of Entry
No
Overseas Visitor Berths
Yes
Dock Type
Floating
Style Side To
Yes
Tidal Flow
Beware
Active Winter
Yes
Weather Forecast
Thu
5AM - 9AM
19 March 2026
W 3 knots increasing to SW 5 knots.
5 to 9°C
UV Index: 0 - Low
Mostly fine
Thu
9AM - 1PM
19 March 2026
- W 5–7 knots.
- Increasing from 8 to 19°C
- UV Index: 5 - Moderate
- Partly cloudy
Thu
1PM - 5PM
19 March 2026
- SW 4 knots.
- 20 to 23°C
- UV Index: 5 - Moderate
- Sunny