Baltimore — Water Temperature, Sea Conditions & Trends

Water Temperature: Daily Trends, Historical Records, and Forecast

✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays.

It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.

Water Temperature Chart Over the Last 30 Days

Water temperature in Baltimore has risen over the last week and month. Currently, the sea water temperature at this location matches the average for this day in previous years.

According to our forecast, Water temperature in Baltimore will be 26.1°C in the next 7 days. See the table below for daily data for the upcoming week.

Table of Daily Sea Temperature Data

Annual Water Temperature Overview by Month

Monthly Water Temp Ranges

30°C

25°C

20°C

15°C

10°c

5°C

0°C

Annual Water Temperature Trend

Baltimore sits on the western edge of the Chesapeake Bay, a large, shallow estuary whose tides and river inputs shape local water conditions. Seasonal surface temperatures reflect that semi-enclosed character: in winter the bay and harbor commonly drop to around 0–5°C, remaining cold well into spring as the water slowly warms. From late spring into early summer surface values typically rise into the 10–20°C range, and by July–August the harbor and nearby shallow coves often reach roughly 20–26°C, with the warmest readings in sheltered, shallow areas. In autumn waters cool again, generally falling through 10–20°C into November and beyond. Local factors — freshwater inflow, wind, depth and tidal flushing — produce variability from one shoreline or marina to another, and surface temperatures can differ from deeper layers.