A dense fog advisory is in effect until 9 a.m. Sunday morning for all of Long Island.

Clouds, drizzle, and areas of dense fog will make for a damp and dreary start to Sunday across the region. Periods of showers are likely through the morning and midday, and visibility could be reduced at times due to fog. Despite the unsettled start, temperatures will be relatively mild for early March, climbing well into the 50s.

Conditions improve heading into the new week as drier air and sunshine return Monday and Tuesday. Temperatures stay comfortably above normal through midweek before another round of unsettled weather arrives by Thursday, with renewed chances for showers. Cooler air then moves back in toward the end of the week.

SUNDAY: Showers likely through the morning, with patchy fog early, then mostly cloudy skies. Temperatures range from the low 50s to upper 50s.

MONDAY: Sunny and pleasant, with light winds. Temperatures range from the low to mid-50s.

TUESDAY: Mostly sunny, with mild conditions continuing. Temperatures range from the mid- to upper 50s.

WEDNESDAY: Mostly cloudy but still mild. Temperatures range from the low to mid-50s.

THURSDAY: Showers likely, especially earlier in the day, with mostly cloudy skies. Temperatures range from the low to mid-50s.

FRIDAY: Partly sunny, with cooler air returning. Temperatures range from the low to mid-40s.

SATURDAY: Mostly cloudy, with slightly milder conditions. Temperatures range from the mid- to upper 40s.