025
FZUS61 KBUF 211409
GLFLO
OPEN LAKE FORECAST FOR LAKE ONTARIO
NATIONAL WEATHER SERVICE BUFFALO NY
1009 AM EDT SAT MAR 21 2026
FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE ONTARIO
WAVES ARE THE SIGNIFICANT WAVE HEIGHT - THE AVERAGE OF THE HIGHEST
1/3 OF THE WAVE SPECTRUM. OCCASIONAL WAVE HEIGHT IS THE AVERAGE OF
THE HIGHEST 1/10 OF THE WAVE SPECTRUM.
SYNOPSIS
A 30.1 INCH HIGH WILL BUILD ACROSS THE LAKE TODAY. A
29.6 INCH LOW WILL THEN CROSS THE LOWER GREAT LAKES SUNDAY BEFORE
SLIDING OFF THE MID-ATLANTIC COAST MONDAY. A 30.4 INCH HIGH IS
FORECAST TO BUILD ACROSS THE UPPER GREAT LAKES MONDAY, THEN MOVE TO
THE LOWER GREAT LAKES TUESDAY WHILE STRENGTHENING TO 30.5 INCHES. A
29.8 INCH LOW TRACKING ACROSS QUEBEC WILL THEN PUSH ITS ASSOCIATED
COLD FRONT ACROSS THE LAKE ON WEDNESDAY.
LOZ062-212100-
LAKE ONTARIO OPEN WATERS FROM THE NIAGARA RIVER TO HAMLIN BEACH-
1009 AM EDT SAT MAR 21 2026
THIS AFTERNOON
LIGHT AND VARIABLE WINDS BECOMING EAST 5 TO
10 KNOTS. WAVES 1 FOOT OR LESS.
TONIGHT
EAST WINDS 10 TO 15 KNOTS. A CHANCE OF RAIN AND SNOW
EARLY, THEN A CHANCE OF RAIN FROM LATE EVENING ON. WAVES 1 TO
2 FEET BUILDING TO 3 TO 5 FEET.
SUNDAY
NORTHEAST WINDS 5 TO 15 KNOTS BECOMING NORTH. RAIN
LIKELY. WAVES 1 TO 3 FEET.
SUNDAY NIGHT
NORTHEAST WINDS 10 TO 15 KNOTS INCREASING TO
15 TO 20 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS IN THE EVENING,
THEN A CHANCE OF SNOW SHOWERS OVERNIGHT. WAVES 2 TO 4 FEET.
MONDAY
NORTH WINDS 15 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET.
TUESDAY
WEST WINDS 5 TO 15 KNOTS INCREASING TO 15 TO 20 KNOTS.
WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET.
WEDNESDAY
NORTHWEST WINDS 15 TO 20 KNOTS BECOMING EAST. WAVES
3 TO 5 FEET SUBSIDING TO 2 TO 4 FEET.
LOZ063-064-212100-
LAKE ONTARIO OPEN WATERS FROM HAMLIN BEACH TO MEXICO BAY-
1009 AM EDT SAT MAR 21 2026
THIS AFTERNOON
LIGHT AND VARIABLE WINDS BECOMING NORTHEAST 5 TO
10 KNOTS. WAVES 1 FOOT OR LESS.
TONIGHT
EAST WINDS 10 TO 15 KNOTS BECOMING SOUTHEAST. A CHANCE
OF RAIN AND SNOW LATE IN THE EVENING. A CHANCE OF RAIN AFTER
MIDNIGHT. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET.
SUNDAY
EAST WINDS 10 TO 15 KNOTS BECOMING NORTH. RAIN LIKELY.
WAVES 1 TO 3 FEET.
SUNDAY NIGHT
NORTH WINDS 15 TO 20 KNOTS BECOMING NORTHEAST. A
CHANCE OF RAIN AND SNOW SHOWERS IN THE EVENING, THEN A CHANCE OF
SNOW SHOWERS OVERNIGHT. WAVES 2 TO 4 FEET BUILDING TO 3 TO
5 FEET.
MONDAY
NORTH WINDS 15 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES 3 TO 6 FEET SUBSIDING TO 1 TO 3 FEET.
TUESDAY
NORTHWEST WINDS 5 TO 10 KNOTS BECOMING WEST AND
INCREASING TO 15 TO 20 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS
TUESDAY NIGHT. WAVES 2 FEET OR LESS BUILDING TO 3 TO 6 FEET.
WEDNESDAY
NORTHWEST WINDS 15 TO 25 KNOTS BECOMING EAST. A
CHANCE OF RAIN AND SNOW SHOWERS DURING THE DAY. WAVES 4 TO 7 FEET
SUBSIDING TO 3 TO 5 FEET. WAVES OCCASIONALLY AROUND 9 FEET.
LOZ065-212100-
LAKE ONTARIO OPEN WATERS FROM MEXICO BAY TO THE SAINT LAWRENCE
RIVER-
1009 AM EDT SAT MAR 21 2026
THIS AFTERNOON
LIGHT AND VARIABLE WINDS. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHEAST WINDS 10 KNOTS OR LESS BECOMING SOUTHEAST
10 TO 15 KNOTS. A CHANCE OF SNOW LATE IN THE EVENING. RAIN AND
SNOW LIKELY AFTER MIDNIGHT, THEN RAIN LIKELY LATE. WAVES 2 FEET
OR LESS.
SUNDAY
SOUTHEAST WINDS 10 TO 15 KNOTS BECOMING NORTH. RAIN
LIKELY. WAVES 2 FEET OR LESS.
SUNDAY NIGHT
NORTH WINDS 10 TO 15 KNOTS BECOMING NORTHEAST
15 TO 20 KNOTS. A CHANCE OF SNOW AND RAIN SHOWERS IN THE EVENING,
THEN A CHANCE OF SNOW SHOWERS OVERNIGHT. WAVES 1 TO 3 FEET
BUILDING TO 2 TO 4 FEET.
MONDAY
NORTH WINDS 15 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES 2 TO 4 FEET SUBSIDING TO 1 FOOT OR LESS.
TUESDAY
NORTHWEST WINDS 5 TO 10 KNOTS BECOMING SOUTHWEST AND
INCREASING TO 15 TO 20 KNOTS. A CHANCE OF SNOW AND RAIN SHOWERS
TUESDAY NIGHT. WAVES 2 FEET OR LESS BUILDING TO 3 TO 6 FEET.
WEDNESDAY
NORTHWEST WINDS 15 TO 20 KNOTS BECOMING EAST. A
CHANCE OF RAIN AND SNOW SHOWERS DURING THE DAY. WAVES 3 TO 6 FEET
SUBSIDING TO 1 TO 3 FEET.
LOZ061-212100-
MAFOR 2115/
ONTARIO WEST 1/2 11100 11200 11210 13220 11200 11800. A CHANCE OF
RAIN TONIGHT AND SUNDAY MORNING. WAVES 1 FOOT OR LESS THIS
AFTERNOON. WAVES 1 TO 2 FEET BUILDING TO 3 TO 5 FEET TONIGHT.
WAVES 1 TO 3 FEET SUNDAY MORNING.
ONTARIO EAST 1/2 11800 12100 11210 11220 11320 11310 11300. A
CHANCE OF SNOW THIS EVENING, THEN A CHANCE OF RAIN OVERNIGHT. A
CHANCE OF RAIN SUNDAY MORNING. WAVES 1 FOOT OR LESS THIS
AFTERNOON. WAVES 1 FOOT OR LESS BUILDING TO 2 TO 4 FEET TONIGHT.
WAVES 2 FEET OR LESS SUNDAY MORNING.
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