WhenToBird

Anser caerulescens · Anatidae

When Do Snow Geese Arrive in Washington?

Adult Snow Goose
Photo: sprcrkwild, CC BY 4.0 via iNaturalist

Snow Geese are winter birds in Washington: the first arrive in late September, they are common by early October, peak in late October (6.2% of checklists), and most are gone by early April.

When to look

First arrivalsSep 22-30late September
Common byOct 1-7early October
PeakOct 22-31late October
Most gone byApr 1-7early April

Best: late October. First arrivals late September; most are gone by early April. Peak: on about 6.2% of Washington checklists.

  1. Jancommon
  2. Febcommon
  3. Marcommon
  4. Apruncommon
  5. Mayrare
  6. Junnot usually seen
  7. Julnot usually seen
  8. Augnot usually seen
  9. Sepuncommon
  10. Octpeak season
  11. Novpeak season
  12. Deccommon

Darker months: more checklists report it. Outlined: peak month.

0%2%4%6%8%Jan 1-7: 3.2% of 41928 checklistsJan 8-14: 3.1% of 31152 checklistsJan 15-21: 3.2% of 31753 checklistsJan 22-31: 3.0% of 42530 checklistsFeb 1-7: 2.5% of 29739 checklistsFeb 8-14: 2.3% of 32746 checklistsFeb 15-21: 2.4% of 40328 checklistsFeb 22-28: 2.6% of 28432 checklistsMar 1-7: 2.6% of 30758 checklistsMar 8-14: 2.5% of 29368 checklistsMar 15-21: 2.3% of 32580 checklistsMar 22-31: 2.2% of 45614 checklistsApr 1-7: 1.6% of 33997 checklistsApr 8-14: 1.4% of 34729 checklistsApr 15-21: 1.3% of 38474 checklistsApr 22-30: 1.0% of 52185 checklistsMay 1-7: 0.6% of 44236 checklistsMay 8-14: 0.4% of 48708 checklistsMay 15-21: 0.3% of 41742 checklistsMay 22-31: 0.1% of 57082 checklistsJun 1-7: 0.1% of 39193 checklistsJun 8-14: 0.1% of 36042 checklistsJun 15-21: 0.1% of 34003 checklistsJun 22-30: 0.1% of 39711 checklistsJul 1-7: 0.1% of 31949 checklistsJul 8-14: 0.1% of 29086 checklistsJul 15-21: 0.1% of 28045 checklistsJul 22-31: 0.1% of 38275 checklistsAug 1-7: 0.1% of 28846 checklistsAug 8-14: 0.1% of 28036 checklistsAug 15-21: 0.1% of 27614 checklistsAug 22-31: 0.1% of 40356 checklistsSep 1-7: 0.2% of 31214 checklistsSep 8-14: 0.1% of 27795 checklistsSep 15-21: 0.2% of 29677 checklistsSep 22-30: 0.8% of 35241 checklistsOct 1-7: 2.6% of 28605 checklistsOct 8-14: 4.0% of 28655 checklistsOct 15-21: 6.3% of 24643 checklistsOct 22-31: 6.3% of 34874 checklistsNov 1-7: 5.9% of 25658 checklistsNov 8-14: 5.7% of 25700 checklistsNov 15-21: 4.6% of 24331 checklistsNov 22-30: 3.8% of 32784 checklistsDec 1-7: 3.6% of 24099 checklistsDec 8-14: 3.3% of 23339 checklistsDec 15-21: 2.5% of 27666 checklistsDec 22-31: 3.0% of 42130 checklistsJanFebMarAprMayJunJulAugSepOctNovDec
Share of complete checklists reporting it, by week (4 per month). Grey bars: fewer than 10 checklists, not counted.

Frequency is the share of complete checklists in Washington that listed the bird, 2016–2025. It is not a head count, and it follows where and when people go birding. How to read it.

JanFebMarAprMayJunJulAugSepOctNovDec
today
Second week of November

Each county is shaded by the share of complete checklists there that listed the bird, blended with the weeks either side. Darker is more often. It follows where people watch birds, not how many birds there are. How to read it.

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Where in Washington

Best counties

Share of checklists at the peak
  1. Skagit CountyBest late October · 1957 checklists that week, 78,154 in all29%
  2. Adams CountyBest early December · 15 checklists that week, 4,574 in all20%
  3. Grant CountyBest mid November · 174 checklists that week, 19,963 in all18%
  4. Walla Walla CountyBest the second week of November · 633 checklists that week, 35,829 in all16%
  5. Whatcom CountyBest late October · 1398 checklists that week, 64,687 in all15%
  6. Franklin CountyBest mid November · 81 checklists that week, 7,970 in all15%

Best spots

Share of checklists at the peak
  1. Mcnary National Wildlife RefugeWalla Walla County, best early December · 22 checklists that week, 2,162 in all95%
  2. Fir Island FarmSkagit County, best mid October · 134 checklists that week, 5,604 in all88%
  3. Skagit-Snoqualmie Wildlife Area Complex (Hall Slough)Skagit County, best the second week of October · 37 checklists that week, 836 in all76%
  4. Buckmire SloughClark County, best mid February · 47 checklists that week, 1,347 in all73%
  5. Hat SloughSnohomish County, best late November · 21 checklists that week, 869 in all70%
  6. Frenchman's Bar Regional ParkClark County, best early November · 23 checklists that week, 982 in all69%

Busy spots report more of everything; compare the checklist counts before you drive anywhere.

Best time of day

In Washington, the Snow Goose is most often listed on checklists started between 1 and 3 pm (2.2% of those checklists).

0%1%2%3%12 am: too few checklists (796) to judge1 am: too few checklists (776) to judge2 am: too few checklists (709) to judge3 am: too few checklists (901) to judge4 am: too few checklists (3221) to judge5 am: too few checklists (16576) to judge6 am: 0.6% of 56744 checklists7 am: 1.4% of 133294 checklists8 am: 1.7% of 184196 checklists9 am: 1.9% of 186303 checklists10 am: 2.1% of 177063 checklists11 am: 2.2% of 154936 checklists12 pm: 2.1% of 138061 checklists1 pm: 2.2% of 127449 checklists2 pm: 2.2% of 121511 checklists3 pm: 2.1% of 107793 checklists4 pm: 1.7% of 82862 checklists5 pm: 1.2% of 57183 checklists6 pm: 0.6% of 39886 checklists7 pm: too few checklists (26969) to judge8 pm: too few checklists (12427) to judge9 pm: too few checklists (3658) to judge10 pm: too few checklists (1500) to judge11 pm: too few checklists (834) to judge12a3a6a9a12p3p6p9p
Share of checklists started in each local hour that reported it. It reflects when people go birding as well as when birds are active. Grey hours have too few checklists (under 2% of the state’s, or under 200) to judge.
Week-by-week table
MonthDays 1-78-1415-2122-end
January3.2%3.1%3.2%3.0%
February2.5%2.3%2.4%2.6%
March2.6%2.5%2.3%2.2%
April1.6%1.4%1.3%1.0%
May0.6%0.4%0.3%0.1%
June0.1%0.1%0.1%0.1%
July0.1%0.1%0.1%0.1%
August0.1%0.1%0.1%0.1%
September0.2%0.1%0.2%0.8%
October2.6%4.0%6.3%6.3%
November5.9%5.7%4.6%3.8%
December3.6%3.3%2.5%3.0%

Neighboring states

  • Oregon: arrives the second week of October, 2 weeks later than Washington
  • Idaho: arrives the second week of October, 2 weeks later than Washington
  • Montana: arrives the second week of March, 22 weeks later than Washington
  • Nevada: arrives mid October, 3 weeks later than Washington

Common questions

When do Snow Geese arrive in Washington?
Snow Geese are winter birds in Washington: the first arrive in late September, they are common by early October, peak in late October (6.2% of checklists), and most are gone by early April.
When do Snow Geese leave Washington?
Most Snow Geese have left Washington by early April, when reports fall below half their usual rate. Stragglers are still reported until mid April.
When is the best time to see a Snow Goose in Washington?
The Snow Goose is reported most often in late October, on about 6.2% of Washington checklists.
Where in Washington are Snow Geese seen most often?
By county, Skagit County, Adams County, and Grant County have the highest peak reporting rates for the Snow Goose (counties with at least 200 checklists).