May 2026 Seawater Data

DAILY SEA SURFACE TEMPERATURE AND SALINITY OBSERVATIONS
Institute of Ocean Sciences, North Saanich, B.C., V8L 4B2
Station: RACE ROCKS
Observer: Laura/Karen/Christine Month: May
YSI ID: #9 Year: 2026
YSI YSI
Temp Sal
Day Time ºC ppt
1 14:30 9.5 30.7
2 15:00 9.6 31.0
3 15:50 9.8 31.1
4 16:25 9.5 30.8
5 16:48 9.7 30.8
6 17:47 9.7 31.0
7 18:07 9.9 30.8
8 19:02 9.8 30.7
9 20:38 9.9 30.7
10 9:50 9.9 30.7
11 9:45 8.9 30.2
12 11:19 10.2 30.7
13
14 10:20 10.3 30.5
15 15:00 9.8 30.8
16 14:00 10.0 31.5
17 14:45 9.4 31.8
18 15:25 9.0 32.3
19 16:20 9.4 31.9
20 17:15 9.4 32.0
21 18:50 9.6 31.8
22 19:25 9.5 31.9
23 10:30 9.9 31.4
24
25 4:32 9.8 31.2
26 11:40 9.9 31.1
27 12:30 10.4 31.0
28 13:12 10.4 31.0
29 13:50 10.3 31.5
30 14:18 9.5 31.9
31 14:19 9.8 31.6

May 30 Census

Mammals:

  • Steller sea lion: 3
  • California sea lion:  35
  • harbour seal: 86
  • elephant seal: 4 females

Birds:

  • gulls:  234
  • cormorant:  38
  • bald eagle:  1
  • black oystercatcher: 14
  • Canada goose: 6
  • harlequin duck: 13
  • barn swallow: 2

Wildlife seen this week inside the reserve but not observed today include: one additional female elephant seal.

Wildlife notes

The four year-old post molt female was last seen on May 28th and has returned to the sea. Of the four remaining elephant seals, the two-year old has lost the most weight and will likely be the next to leave, followed by L334.

The 3 year-old (L334 on the left) and two year-old elephant seals. L334 had just come up from a wetting on the boat ramp and took a rest beside the two year-old.

The cranky two year-old unimpressed by the closeness.

The youngest and oldest females spent the past two days by the energy building. Judging by the poo smear on the tower walkway, one of them even spent some time at the tower base, which isn’t an easy uphill trip for an elephant seal.

The mature female and the one year-old on the pathway to the energy building.

Facility work

  • cleaned solar panels
  • general cleaning

Vessels

  • Ecotourism: 3
  • Private: 2 kayakers

Weather

Clear skies. Westerlies 21 to 30 knots. Daytime temperatures 9 to 12 degrees.

Blustery

Wildlife notes

The house is shuddering, the seas tossed and the grass wind whipped. The gulls are mostly on their bellies, head to the wind.  Their beaks are the best wind vanes around revealing the small wind shifts caused by the terrain and structures. The pigeon guillemots and cormorants were out feeding, the sea lions lounging on the rocks and the elephant seals asleep in the grass, unbothered by the winds.

Facility work

The high winds kept me off the roof today but the batteries were so well charged yesterday that the dirty solar panels were able to bring the charge back up to 97% by sundown today.

  • battery fluid top up
  • daily water sample
  • house cleaning
  • no solar panel cleaning

Vessels

  • Ecotourism: 0
  • Private: 0

Weather

Clear skies. Winds W to WNW 28 to 39 knots, gusting to 46. Daytime temperatures 10 to 11 degrees.

Old Lister

Old Lister left the island today in pieces.  She was dismantled and carted away as part of a larger push to remove old equipment, batteries, fuel drums and other toxic materials from the island.  It all went well thanks to a safe and well executed plan, a hardy team of helpers and some very cooperative elephant seals.

Old Lister, the retired Lister 25 KW Diesel Generator Set

Mike operating the belay system to control the decent of the cart down to the boat ramp.

The cart held anchored in place while the crew handlines the boat toward the ramp. The two year-old (center) and the large adult female elephant seal (right) eager to go for a swim were surprisingly tolerant of the activities.

Loading the first and heaviest component.

The two year-old decided she had enough after the first two carts were loaded and headed back uphill.

The team celebrating the successful mission! All the heavy pieces made it aboard.  The rest of Old Lister can leave the island with a much smaller work crew.

Facility work

  • removal of Old Lister
  • solar panel cleaning

Vessels

  • ecotourism: 3
  • private: 1

Visitors

The work crew composed of 3 Pearson staff, 1 alumni and 4 additional helpers

Weather

Skies clear. Westerlies 6 to 22 knots until 3pm, then reaching 40 knots with gusts of 46 by 6pm. Daytime temperatures 11 to 15 degrees.

L334

Wildlife notes

When I left Race Rocks on Feb 5th 2026, Sylvia and Ms. B. Lackie, her 17 day-old pup, were the only two elephant seals on the island.  Sylvia left shortly after her pup was weaned and Ms. B. Lackie stayed a lot longer.  Month later now, the grass is knee high and there are 5 different female elephant seals here on Race Rocks. The most famous of these is L334.  She was tagged as a weanling in March 3, 2023 in Ano Nuevo State Park in California. Each year thousands of elephant seals return to the park to breed and to molt (here is a link to their live camera to see just how many and how tightly packed they are).

In May 2024, the one-year-old L334 came to Race Rocks to molt. In her first year she traveled about 750nm to get here and quite possibly did the journey alone.  She came again to molt in April 2025, and is here again this May as a three year-old.

L334 – The 3 year-old elephant seal born in Ano Nuevo State Park, California, coming back from her daily swim. Behind her is a mature female.

L334 and her tag

Using L334 as a size reference, I figure we currently have one, two, three and four year-old juvenile females and one mature female. Note, the one year-old cannot be Ms B Lackie as elephant seals don’t molt until the year after they are born.

The 1 year old is mid-molt, the two to four year-olds are in the late stages of molt and will be leaving soon.  The large adult is just preparing to start her molt.

From  left to right: The two year-old at the end stages of her molt and the “scruffy” one year-old mid way through her molt.

From left to right: The mature female preparing to molt, a four year-old in the late stage molt, and  the three year old L334, also in late stage molt.

Facility work

  • topped up battery fluid
  • cleaned house
  • ran the desalinator
  • cleaned solar panels

Vessels

  • Ecotourism: 17
  • Private: 3

Weather

Sunny. Winds W 5 to 20. Daytime temperature 9 to 13 degrees.

Animal Census May 22

Census was done on Friday May 22 because Saturday May 23 is my last day at Race Rocks. It was foggy in the morning and evening which added too the challenge.

 

Mammals:

  • Steller sea lion: 2
  • California sea lion:17
  • Harbor seal: 12
  • Elephant seal: 5

 

Birds:

  • Gulls: 238
  • Cormorants: 14
  • Canada goose: 8
  • Pigeon guillemot: 140
  • Black oyster catcher: 6
  • Harlequin ducks: 10
  • Bald Eagle (Adult): 1

Other animals I’ve been seeing recently but didn’t see on the day of the census : Brown pelican, Barn swallows, Killdeer

Tide Pooling

Friday, May  2026

 

Ecological Notes

There were some nice low tides this week so I spent some time tide pooling around the island.

An amphipod, looks like an Ischyroceridae, not your normal intertidal amphipod

Algae appreciation

I also found the Brown pelican, which was pretty exciting

Brown pelican

And I’ve only recently been seeing some juvenile gulls, I’ve been wondering if they may be a different species than the others here, so far I’ve only be able to distinguish the Glaucous-winged and the Herring Gulls. Another note on the Gulls, they’ve started building their nests this week.

Juvenile Gull

It looks like we’re back down to 5 elephant seals as of Thursday, not sure where the other one went but nothing seems amiss.

 

Facility Work

  • Cleaning solar panels
  • Cleaning windows
  • Cleaned out the fridge and freezer as well as some additional odd house cleaning jobs
  • Check batteries
  • Check generator fuel
  • Check Goose Nests
  • Check Fence
  • Salinity testing


Weather Events

Wednesday, May 20

Wind (kts): 0-20.8
Mostly sunny
Air temp (°C): min 9.4 , max 14.1
Sea state: calm

Thursday, May 21

Wind (kts): 0-20.3
Mostly sunny
Air temp (°C): min 7.1 , max 17.5
Sea state: Calm

Friday, May 22

Wind (kts): 1.4 – 47.2
Foggy in the morning then cleared up
Air temp (°C): min 9.6, max 10.9
Sea state: calm, building a little in the evening

Vessel Traffic

Pretty steady stream of ecotourist boats coming through now. I have seen groups of whale watching vessels outside of the reserve, but I haven’t spotted any whales myself. Only a few ecotourist boats on Friday, surprisingly, maybe because of the fog in the morning.

Visitors

None

 

*Any close up shots of animals were taken with a telephoto lens

Tuesday, May 19 2026

Hi Everyone! My name is Karen and I’m excited to be staying at Race Rocks this week as the Ecoguardian. I’m looking forward to getting to observe the wildlife, get to know the area better and familiarizing myself with some of the processes that keep this place running!

Ecological Notes

Another young elephant seal showed up on Sunday, bringing the total up to 6 here now.

I’m thinking this could be a new game, “Molting elephant seal or mossy rock”

Can you see the elephant seals?

Elephant seals or mossy rocks?

Each of the above photos has 2 elephant seals

I found some other birds that I didn’t see when doing my census :

Killdeer

Dunlin

Harlequin ducks

I also saw a Raven, and juvenile Bald Eagle

Facility Work

  • Cleaning solar panels
  • Testing and repairing the fence
  • Cleaning windows
  • Check batteries
  • Check generator fuel


Weather Events

Tuesday, May 19

Wind (kts): 0.1- 22.5
Mix of sun and cloud
Air temp (°C): min 10.3 , max 11.6
Sea state: Calm during the day, building to choppy in the evening.

Monday, May 18

Wind (kts): 1.2- 25.6
Mix of sun and cloud
Air temp (°C): min 9.9 , max 13.2
Sea state: Choppy with some white caps

Sunday, May 17

Wind (kts): 0- 24.1
Mostly sunny
Air temp (°C): min 8.8 , max 13.7
Sea state: Calm during the day, building to choppy in the evening.

Vessel Traffic

Pretty quiet most days as it has been mostly near gale winds. A few ecotourist boats Sunday and Tuesday, and a couple personal vessels on Sunday.

Visitors

Some students from Pearson College came out Tuesday to do their field final exams.

 

*Any close up shots of animals were taken with a telephoto lens