Wind Forecast Guidance The surface wind animation depicts predicted hourly surface (33 ft [10m] above the water) winds for the next 48 hours based on weather model forecast guidance from the NOAA/NWS North American Mesoscale (NAM) Model or the Global Forecast System (GFS), if guidance from the NAM Model is not available. There are several different regions for the Chesapeake Bay forecasts. With an average air temperature of 77.9°F / 25.5°C, July is the warmest month in a year. Water temperature in Chesapeake Bay today is 12°C/53.6°F. You can use the map on this page to find the name of the region that you’re interested in. Today the wave height in Chesapeake Bay does not exceed 1 meter (3 ft 3 in) and it is sea suitable for swimming. Because of slow improvements in water-quality conditions, the bay was listed as an impaired water body under the regulatory laws related to the Clean Water Act. Based on our historical data over a period of ten years, the warmest water in this day in Chesapeake Bay was recorded in 2011 and was 11.6°C/52.9°F, and the coldest was recorded in 2008 at 8°C/46.4°F. August is the month with the highest water temperature at 80.6°F / 27°C. Water Quality Standards Attainment and Monitoring. In addition, the Chesapeake Bay Preservation Act (CBPA) and accompanying regulations provide a framework for local government planning and development criteria to help address water quality and run-off into the Bay. Always check the regional marine forecast before you go out boating. Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 254pm EST Sunday Dec 6 2020 Synopsis An upper level low will approach the region tonight before passing through Monday. Monitoring the attainment of water quality standards will give us the information needed to track trends in nutrient and sediment pollution and assess whether or not Chesapeake Bay water quality is high enough to support aquatic living resources. In the coming days the sea will remain calm. The coldest month is February with an average water temperature of 40.1°F / 4.5°C. The table below provides detailed information about the sea conditions for the next 10 days by time of day. Water temperature in all major watersheds across the Chesapeake Bay was so hot in 2019 its effects led the University of Maryland Center for Environmental Science to rank the bay… Fox Island sits in the bay off Virginia and Maryland, where sea level rise due to climate change is a major threat. High pressure will approach Tuesday before settling to the south Wednesday through Friday. Weather on the Chesapeake Bay can change quickly. 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